Guðrøðr Rǫgnvaldsson

Guðrøðr Rǫgnvaldsson
King of the Isles
Guðrøðr's name as it appears on folio 42v of British Library Cotton Julius A VII (the Chronicle of Mann): "Godredus".
Died	1231 Lewis and Harris
Issue	Haraldr Guðrøðarson
House	Crovan dynasty
Father	Rǫgnvaldr Guðrøðarson

Guðrøðr Rǫgnvaldsson (died 1231), also known as Guðrøðr Dond, was a thirteenth-century ruler of the Kingdom of the Isles. He was a member of the Crovan dynasty, and a son of Rǫgnvaldr Guðrøðarson, King of the Isles, the eldest son of Guðrøðr Óláfsson, King of Dublin and the Isles. Although the latter may have intended for his younger son, Óláfr, to succeed to the kingship, the Islesmen instead settled upon Rǫgnvaldr, who went on to rule the Kingdom of the Isles for almost forty years. The bitterly disputed royal succession divided the Crovan dynasty for three generations, and played a central role in Guðrøðr's recorded life.

Guðrøðr's mother was Rǫgnvaldr's wife. Whilst the name of this woman is unknown, she appears to have been a member of the Clann Somhairle kindred. Although Rǫgnvaldr was able to orchestrate a marriage between Óláfr and her sister, Óláfr was able to oversee the nullification of this alliance and proceeded to marry the daughter of a leading Scottish magnate. In consequence, Guðrøðr's mother ordered her son to attack Óláfr. Although Guðrøðr is recorded to have ravaged Óláfr's lands on Lewis and Harris, the latter was able to escape to the protection of his father-in-law on the Scottish mainland. In about 1223, Óláfr, and his adherent Páll Bálkason, invaded Skye, defeated Guðrøðr, and blinded and castrated him.

Guðrøðr's maiming marks a turning point in the feud between Rǫgnvaldr and Óláfr. With the escalation of hostilities, Rǫgnvaldr bound himself to Alan fitz Roland, Lord of Galloway. Although Rǫgnvaldr was greatly aided by Alan's military might, Óláfr eventually gained the upper hand, and Rǫgnvaldr was slain in 1229. Afterwards, Alan and his Clann Somhairle allies continued to pressure Óláfr, forcing him from the Isles to Norway where news of the continual warfare had already reached Hákon Hákonarson, King of Norway. As a result, Hákon elevated an apparent Clann Somhairle dynast, a certain Óspakr, as King of the Isles, and outfitted him with a fleet to secure control of the Isles.

Guðrøðr seems to have been one of Óspakr's principal supporters, and accompanied him in the ensuing campaign that reached the Isles in 1230. Óspakr seems to died from injuries sustained in the midst of the operation after which command fell to Óláfr. Although the latter proceeded to divert the fleet to Mann where he was reinstalled as king, Guðrøðr was recognised as king of the Hebridean portion of the realm. The following year, after the Norwegians vacated the Isles, both Guðrøðr and Páll are reported to have been killed. Although Óláfr consolidated control of the entirety of the Crovan dynasty's realm, ruling it for the rest of his life, Guðrøðr's son, Haraldr, continued the dynastic feud with Óláfr's successors, and temporarily held the kingship at the midpoint of the century.

Antecessors

Locations relating to Guðrøðr's life and times.

Guðrøðr was a son of Rǫgnvaldr Guðrøðarson, King of the Isles, and a member of the Crovan dynasty. Guðrøðr's mother was Rǫgnvaldr's wife, a woman who is styled Queen of the Isles by the thirteenth- to fourteenth-century Chronicle of Mann. Although her parentage is uncertain, the chronicle describes her father as a nobleman from Kintyre, which suggests that he was a member of Clann Somhairle. Rǫgnvaldr was a son of Guðrøðr Óláfsson, King of Dublin and the Isles. Other children of this ruler include Affrica, Ívarr, Óláfr, a daughter whose name is unknown, and possibly a son named Ruaidhrí.

The name of Guðrøðr's father, Rǫgnvaldr Guðrøðarson, as it appears on folio 40v of British Library Cotton Julius A VII: "Reginaldus filjus Godredi".

Whilst Óláfr's mother was Fionnghuala Nic Lochlainn, an Irishwoman whose marriage to Guðrøðr Óláfsson was formalised (at about the time of Óláfr's birth) in 1176/1177, Rǫgnvaldr's mother appears to have been another Irishwoman named Sadbh. When Guðrøðr Óláfsson died in 1187, the chronicle reports that he left instructions for Óláfr to succeed to the kingship since the latter had been born "in lawful wedlock". Whether this is an accurate record of events is uncertain, as the Islesmen are stated to have chosen Rǫgnvaldr to rule instead, because unlike Óláfr, who was only a child at the time, Rǫgnvaldr was a hardy young man fully capable to reign as king. The fact that Rǫgnvaldr and Óláfr had different mothers may well explain the intense conflict between the two men in the years that followed. This continuing kin-strife is one of the main themes of Rǫgnvaldr's long reign.

A king gaming piece of the so-called Lewis chessmen.

At some point after assuming control of the kingdom, the chronicle reports that Rǫgnvaldr gave Óláfr possession of a certain island called "Lodhus". Whilst the name of this island appears to refer to Lewis—the northerly half of the Outer Hebridean island of Lewis and Harris—the chronicle's text seems to instead refer to Harris—the southerly half. In any case, the chronicle further relates that Óláfr later confronted Rǫgnvaldr for a larger share of the realm, after which Rǫgnvaldr had him seized and sent to William I, King of Scotland, who kept him imprisoned for almost seven years until about the time of the latter's death in 1214. Since William died in December 1214, Óláfr's incarceration appears to have spanned between about 1207/1208 and 1214/1215. Upon Óláfr's release, the chronicle reveals that the half-brothers met on Mann, after which Óláfr set off on a pilgrimage to Santiago de Compostela.

Scandinavian sojourn

A rook gaming piece of the so-called Lewis chessmen.

In 1210, Rǫgnvaldr appears to have found himself the target of renewed Norwegian hegemony in the Isles. Specifically, the Icelandic annals reveal that a military expedition from Norway to the Isles was in preparation in 1209. The following year, the same source makes note of "warfare" in the Isles, and specifies that the holy island of Iona was pillaged. These reports are corroborated by Bǫglunga sǫgur, a thirteenth-century saga-collection that survives in two versions. Both versions reveal that a fleet of Norwegians plundered in the Isles, and the shorter version notes how men of the Birkibeinar and the Baglar—two competing sides of the Norwegian civil war—decided to recoup their financial losses with a twelve-ship raiding expedition into the Isles. The longer version states that "Ragnwald" (styled "Konge aff Möen i Syderö") and "Gudroder" (styled "Konge paa Manö") had not paid their taxes due to the Norwegian kings. In consequence, the source records that the Isles were ravaged until the two travelled to Norway and reconciled themselves with Ingi Bárðarson, King of Norway, whereupon the two took their lands from Ingi as a lén (fief).

The name of Ingi Bárðarson as it appears on folio 139v of AM 47 fol (Eirspennill): "Inga Barðar s(son)". The thirteenth-century kings of Norway were nominal overlords of the kings of the Isles.

The two submitting monarchs of the saga most likely represent Rǫgnvaldr and Guðrøðr. Their submission appears to have been undertaken in the context facing the strengthening position of the Norwegian Crown following the settlement between the Birkibeinar and Baglar, and the simultaneous weakening of the Crovan dynasty due to internal infighting. The destructive Norwegian activity in the Isles may have been some sort of officially sanctioned punishment from Norway due to Rǫgnvaldr's recalcitrance in terms of, not only his Norwegian obligations, but his recent reorientation towards the English Crown. The fact that Ingi turned his attention to the Isles so soon after peace was brokered in Norway may well indicate the importance that he placed on his relations with Rǫgnvaldr and his contemporaries in the Isles. There is reason to suspect that Óláfr had earlier approached Ingi in an attempt to garner support in gaining his perceived birthright before Rǫgnvaldr was able to have Óláfr imprisoned by the Scots. With Óláfr thus neutralised, Rǫgnvaldr could well have submitted to the Norwegian Crown in the context of further securing his hold of the kingship. In any event, the albeit confused titles accorded to Rǫgnvaldr and Guðrøðr by the saga seem to reveal that Guðrøðr possessed some degree of power in the Isles by the early thirteenth century.

Kin-strife

A queen gaming piece of the so-called Lewis chessmen.

Upon Óláfr's return from his pilgrimage, the chronicle records that Rǫgnvaldr had Óláfr marry "Lauon", the sister of his own wife. Rǫgnvaldr then granted Lodhus back to Óláfr, where the newlyweds proceeded to live until the arrival of Reginald, Bishop of the Isles. The chronicle claims that the bishop disapproved of the marriage on the grounds that Óláfr had formerly had a concubine who was a cousin of Lauon. A synod was then assembled, after which the marriage is stated to have been nullified. Although the chronicle alleges that Óláfr's marriage was doomed for being within a prohibited degree of kinship, there is reason to suspect that the real reason for its demise was the animosity between the half-brothers. Once freed from his arranged marriage, Óláfr proceeded to marry Cairistíona, daughter of Fearchar mac an tSagairt, a man closely aligned with Alexander II, King of Scotland.

The royal title of Lauon's sister—Guðrøðr's mother—as it appears on folio 42v of British Library Cotton Julius A VII: "regina Insularum" ("Queen of the Isles"). Almost nothing is known of queenship in the Isles.

If the chronicle is to be believed, Óláfr's separation from Lauon enraged her sister—the wife of Rǫgnvaldr and mother of Guðrøðr—who surreptitiously tricked Guðrøðr into attacking Óláfr in 1223. Following what he thought were his father's orders, Guðrøðr gathered a force on Skye—where he was evidently based—and proceeded to Lodhus, where he is reported to have laid waste to most of the island. Óláfr is said to have only narrowly escaped with a few men, and to have fled to the protection of his father-in-law on the mainland in Ross. Óláfr is stated to have been followed into exile by Páll Bálkason, a vicecomes on Skye who refused to take up arms against him. At a later date, Óláfr and Páll are reported to have returned to Skye and defeated Guðrøðr in battle.

Eilean Chaluim Chille, Kilmuir, Skye. This meadow was once a loch, and may have been the site where Guðrøðr was attacked and defeated by Óláfr.

The chronicle specifies that Guðrøðr was overcome on "a certain island called the isle of St Columba". This location may be identical to Skeabost Island in the mouth of the river Snizort (NG41824850). Another possibility is that the isle in question is the now-landlocked island of Eilean Chaluim Chille in the Kilmuir district (NG37706879). This island once sat in Loch Chaluim Chille before the loch was drained of water and turned into a meadow. There is archaeological evidence to suggest that a fortified site sat on another island in the loch, and that this islet was connected to the monastic island by a causeway. If correct, the fortification could account for Guðrøðr's presence near an ecclesiastical site. According to the chronicle, Óláfr's forces consisted of five boats, and encircled the island after having launched from the opposite shore two stadia from it. This distance, about 2 furlongs (400 metres), suggests that the island is more likely Eilean Chaluim Chille than Skeabost Island, as the former appears to have sat between 285 metres (935 feet) and 450 metres (1,480 feet) from the surrounding shores of Loch Chaluim Chille. In any case, in consequence of the defeat, Guðrøðr's captured followers were put to death, whilst Guðrøðr himself was blinded and castrated. It is possible that Óláfr was aided by Fearchar in the strike against Guðrøðr. Certainly, the chronicle's account seems to suggest that Óláfr accumulated his forces whilst sheltering in Ross. Although the chronicle maintains that Óláfr was unable to prevent this torture, and specifically identifies Páll as the instigator of the act, the Icelandic annals record that Óláfr was indeed responsible for his nephew's plight, and make no mention of Páll.

The name of Páll Bálkason as it appears on folio 42v of British Library Cotton Julius A VII: "Pol filius Boke".

The mutilation and killing of high-status kinsmen during power struggles was not an unknown phenomenon in the peripheral regions of the British Isles during the High Middle Ages. For instance, in only the century-and-a-half of its existence, at least nine members of the Crovan dynasty perished from mutilation or assassination. For instance, in only the century-and-a-half of its existence, at least nine members of the Crovan dynasty perished from mutilation or assassination. As such, there is reason to regard this vicious internecine violence as the Crovan dynasty's greatest weakness. To contemporaries, the tortures of blinding and emasculation were a means of depriving power from a political opponent. Not only would the punishment deny a man the ability to sire descendants, it would divest him of personal power, limiting his ability to attract supporters, and further offset the threat of future vengeance. The maiming inflicted upon Guðrøðr seems to exemplify Óláfr's intent to wrest his perceived birthright from Rǫgnvaldr's bloodline. It is unknown why Rǫgnvaldr did not similarly neutralise Óláfr when he had the chance years before, although it may have had something to do with the preservation of international relations. For example, it is possible that his act of showing leniency to Óláfr had garnered Scottish support against the threat of Norwegian overlordship. In any case, the neutralisation of Guðrøðr appears to mark a turning point in the struggle between the Óláfr and Rǫgnvaldr.

Escalation of warfare

The seal of Alan fitz Roland, Rǫgnvaldr's ally against Óláfr.

In 1224, the year following Guðrøðr's defeat, the chronicle reveals that Óláfr took hostages from the leading men of the Hebridean portion of the realm, and confronted Rǫgnvaldr on Mann directly. It was then agreed that the kingdom would be split between the two: with Rǫgnvaldr keeping Mann itself along with the title of king, and Óláfr retaining the a share in the Hebrides. With Óláfr's rise at Rǫgnvaldr expense, the latter turned to Alan fitz Roland, Lord of Galloway, one of Scotland's most powerful magnates. Whilst the pair are elsewhere stated to have campaigned in the Hebrides, the chronicle recounts that their operations came to nought because the Manx were unwilling to battle against Óláfr and the Hebrideans.

Detail from Maughold IV, a Manx runestone displaying a contemporary sailing vessel. The power of the kings of the Isles lay in their armed galley fleets.

A short time later, perhaps in about 1225 or 1226, the chronicle reveals that Rǫgnvaldr oversaw the marriage of a daughter of his to Alan's young illegitimate son, Thomas. Unfortunately for Rǫgnvaldr, this marital alliance appears to have cost him the kingship, since the Manxmen are further reported to have had him removed from power and replaced with Óláfr. The recorded resentment of the union could indicate that Alan's son was intended to eventually succeed Rǫgnvaldr, who had reigned for almost forty years and was perhaps about sixty years-old at the time, and whose grandchildren were presumably still very young. In fact, it is possible that, in light of Rǫgnvaldr's advanced age and Guðrøðr's maiming, a significant number of the Islesmen regarded Óláfr as the rightful heir. Such a view could well account for the lack of enthusiasm that the Manxmen had for Alan and Rǫgnvaldr's campaign in the Hebrides. Since Thomas was likely little more than a teenager at the time, it may well have been obvious to contemporary observers that Alan was the one who would hold the real power in the kingdom.

Tynwald Hill, near St John's may have been a national assembly site of the Kingdom of the Isles. Tynwald was the site of the final conflict between Óláfr and Rǫgnvaldr. It may well have been the place where the Islesmen publicly inaugurated their kings, proclaimed new laws, and resolved disputes.

At this low point of his career, the deposed Rǫgnvaldr appears to have gone into exile at Alan's court in Galloway. In 1228, whilst Óláfr and his chieftains were absent in Hebrides, Rǫgnvaldr, Alan, and (Alan's brother) Thomas fitz Roland seized control of Mann. Suffering serious setbacks at the hands of his opponents, Óláfr reached out for English assistance against his half-brother, and eventually regained possession of the island. In what was likely early January 1229, Rǫgnvaldr successfully invaded Mann. According to the chronicle, Rǫgnvaldr and Óláfr led their armies to Tynwald, where Rǫgnvaldr's forces were routed with Rǫgnvaldr amongst the slain. Although the latter's fall is laconically corroborated by the Icelandic annals, other sources appear to suggest that his death was due to treachery. The fourteenth-century Chronicle of Lanercost, for example, states that Rǫgnvaldr "fell a victim to the arms of the wicked"; whilst the Chronicle of Mann notes that, although Óláfr grieved at his half-brother's death, he never exacted vengeance upon his killers. Although the chronicle's accounts of Guðrøðr's maiming and Rǫgnvaldr's death could be evidence that Óláfr was unable to control his supporters during these historical episodes, it is also possible that the compilers of this source sought to disassociate Óláfr from these acts of violence against his kin.

Invasion of the Isles

Guðrøðr's name and epithet as it appears on folio 44v of British Library Cotton Julius A VII: "Ghotdredo Don". The epithet refers to the colour brown.

The death of Alan's ally did not deter Gallovidian interests in the Isles. In fact, it is apparent that Alan and members of the Clann Dubhghaill branch of Clann Somhairle upheld pressure upon Óláfr. Reports of open warfare in the Isles reached the royal court of Hákon Hákonarson, King of Norway in the summer of 1229. The thirteenth-century Hákonar saga Hákonarsonar specifically singles out Alan as one of the principal perpetrators of unrest in the Isles, along with several members of Clann Somhairle: Dubhghall mac Dubhghaill, Donnchadh mac Dubhghaill, and a certain Somhairle. Although Óláfr arrived at the Norwegian court early in 1230, having been forced from the Isles by Alan and his allies, it is evident that Hákon had already decided upon a course of action.

The name of Óspakr-Hákon, an apparent Clann Somhairle dynast, as it appears on folio 163v of AM 47 fol: "Uspakr konungr".

The Icelandic annals, the Chronicle of Mann, the saga, and the Chronicle of Lanercost all reveal that Hákon handed over the kingship of the Isles to Óspakr, an apparent member of Clann Dubhghaill who had long served outside the Isles in Norway. Other Islesmen in Norway before Óláfr's arrival were Páll and Guðrøðr, the latter who seems to have been one of Óspakr's principal supporters. According to saga, Hákon not only granted Óspakr the kingship, but also gave him command of the Norwegian fleet tasked with restoring peace in the Isles. Within days of Óláfr's arrival in Norway, the saga reveals that Óspakr's fleet set sail for the Isles, and swelled in number after reaching Orkney. Whilst the Eirspennill version of the saga numbers the fleet in Norway at twelve ships, the Flateyjarbók, Frísbók, and Skálholtsbók versions give the number eleven; and whilst the former version relates that the fleet gained twenty ships from Orkney, the latter three versions state that the fleet numbered twenty when it left Orkney. Once in the Isles, the fleet linked up with three leading members of Clann Somhairle on Islay.

Ruinous Rothesay Castle. According to saga accounts, Óspakr's forces attacked the castle's soft stone walls, whilst the Scots poured boiling pitch down upon them. Later in the century, the castle appears to have undergone considerable reconstructional enhancement.

News of the gathering Norwegian fleet soon reached Alexander II, who appears to have made straight for the western coast, diverting his attention to the now rapidly developing crisis. On 28 May, Alan is recorded in Alexander II's presence at Ayr, where the Scottish royal forces appear to have assembled. It was probably May or June when Óspakr's fleet rounded the Mull of Kintyre, entered the Firth of Clyde, and made landfall on Bute, where his forces successfully stormed and captured a fortress that is almost certainly identical to Rothesay Castle. The Flateyjarbók, Frísbók, and Skálholtsbók versions of the saga specify that the castle fell after three days of battle, and that three hundred Norwegians and Islesmen fell in the assault. By this stage in the campaign, the fleet is stated to have reached a size of eighty ships, a tally which may indicate that Óspakr's fighting force numbered over three thousand men. Reports that Alan was in the vicinity, at the command of a massive fleet, are stated to have forced the Norwegians to withdraw to Kintyre. Whilst the Eirspennill version of the saga numbers Alan's fleet at almost two hundred ships, the Flateyjarbók, Frísbók, and Skálholtsbók versions give a tally of one hundred and fifty. These totals suggest that Alan commanded a force of two thousand or three thousand men.

Coat of arms of Hákon Hákonarson as depicted on folio 216v of Cambridge Corpus Christi College Parker Library 16II (Chronica majora).

Having withdrawn his fleet to Kintyre, Óspakr took ill and died, presumably succumbing to injuries sustained from the assault on Bute. According to the saga, the king's death was bitterly lamented amongst his followers. In consequence of Óspakr's fall, the Chronicle of Lanercost, the Chronicle of Mann, and the saga reveal that command of the fleet was assumed by Óláfr, who successfully eluded Alan's forces, and capitalised upon the situation by diverting the armada to Mann. Although Óláfr succeeded in being reinstated as king after overwhelming some initial opposition, he was nevertheless forced to partition the realm with Guðrøðr, who took up kingship in the Hebrides.

Despite Óspakr's elevation as king, it is uncertain how Hákon envisioned the governance of the Kingdom of the Isles. On one hand, it is possible that Hákon intended for Óspakr and Guðrøðr to divide the kingdom at Óláfr's expense. On the other hand, the fact that Óláfr's struggle against Alan and Clann Somhairle is acclaimed by the saga could be evidence that Hákon did not intend to replace Óláfr with Óspakr. Instead, Hákon may have planned for Óspakr to reign over the sprawling domain of Clann Somhairle as a way to ensure the kindred's obedience. Óspakr's prospective realm, therefore, seems to have comprised Argyll, Kintyre, and the Inner Hebrides. If correct, the fleet's primary design would appear to have been the procurement of Óspakr's domain, whilst a secondary objective—adopted very late in the campaign—seems to have been the restoration of Óláfr on Mann.

The name and title of Óláfr Guðrøðarson as it appears on folio 44r of British Library Cotton Julius A VII: "Olavus rex".

It is also possible that Hákon originally ordered a division of power between Óláfr and Guðrøðr, and that Hákon originally promised to lend support to Óláfr's cause on the condition of a concession of authority to Guðrøðr, who—like Óspakr—could have been recognised as king by the Norwegian Crown. An accommodation between Óláfr and Guðrøðr could well have benefited both men, as it would have safeguarded their kindred against the dynastic ambitions of Alan, offsetting the royal marriage between this man's son and Guðrøðr's sister. In any case, the Chronicle of Mann and the saga reveal that the Norwegian forces left Mann for home in the following spring, and established Guðrøðr in the Hebrides. Before the end of 1231, both Páll and Guðrøðr are reported to have been killed. Whilst the saga merely locates Guðrøðr's death to the Suðreyjar—an Old Norse term roughly equating to the Hebrides and Mann—the chronicle specifically locates the incident on Lodhus.

Upon the homeward return of the Norwegians, the saga declares that Hákon's "honours had been won" as a result of the expedition, and that he himself heartily thanked the men for their service. The operation itself seems to mark a turning point in the history of the Kingdom of the Isles. Although the kings that ruled the realm before Rǫgnvaldr could afford to ignore Norwegian royal authority, it is apparent that those who ruled after him required a closer relationship with the Norwegian Crown. Óláfr went on to rule the realm until his death in 1237. Although Scottish sources fail to note the Norwegian campaign, its magnitude is revealed by English sources such as the Chronicle of Lanercost, and the thirteenth-century Annales de Dunstaplia, with the latter reporting that the campaigning Norwegians and Islesmen were only overcome with much labour after they had invaded Scotland and Mann and inflicted considerable casualties.

Guðrøðr's name and epithet as it appears on folio 163v of AM 47 fol: "Gudʀeði Svarta". This epithet—accorded to Guðrøðr by Hákonar saga Hákonarsonar—refers to the colour black.

The context of Guðrøðr's final fall suggests that, despite his injuries and impairment, he was able to swiftly assert his authority and eliminate Páll. Although the Norwegians' presence may have temporarily constrained the implacable animosities of the Islesmen, the fleet's departure appears to have been the catalyst of renewed conflict. Evidently still an adherent of Óláfr—certainly, the two are reported to have sailed on the same ship at the outset of Óspakr's campaign—Páll's annihilation suggests that Guðrøðr avenged his father's destruction and his own mutilation. The fact that Óláfr was able to regain and retain control of the realm after Guðrøðr's demise suggests that Óláfr may have moved against him once the Norwegians left the region.

Óláfr was succeeded by his son, Haraldr, who was in turn succeeded by another son, Rǫgnvaldr. This monarch was slain in 1249, seemingly by an associate of Guðrøðr's son, Haraldr, whereupon the latter assumed the kingship. This abrupt seizure of royal power by Guðrøðr's son—almost twenty years after Guðrøðr's death—exposes the fact that the inter-dynastic strife between lines of (Guðrøðr's father) Rǫgnvaldr and Óláfr carried on for yet another generation. The infighting only came to an end in the reign of the dynasty's final monarch, Óláfr's son, Magnús.

References

Primary sources

• "AM 47 Fol (E) – Eirspennill". Skaldic Project. n.d. Archived from the original on 26 January 2016. Retrieved 25 June 2016.{{cite web}}: CS1 maint: year (link)
• Anderson, AO, ed. (1922). Early Sources of Scottish History, A.D. 500 to 1286. Vol. 2. London: Oliver and Boyd.
• Bain, J, ed. (1881). Calendar of Documents Relating to Scotland. Vol. 1. Edinburgh: H. M. General Register House. hdl:2027/mdp.39015014807203.
• "Cotton MS Julius A VII". British Library. n.d. Archived from the original on 20 July 2021. Retrieved 4 July 2017.{{cite web}}: CS1 maint: year (link)
• Dasent, GW, ed. (1894). Icelandic Sagas and Other Historical Documents Relating to the Settlements and Descents of the Northmen on the British Isles. Rerum Britannicarum Medii Ævi Scriptores. Vol. 4. London: Her Majesty's Stationery Office.
• Dimock, JF, ed. (1868). Giraldi Cambrensis Opera. Rerum Britannicarum Medii Ævi Scriptores. Vol. 6. London: Longmans, Green, Reader, and Dyer.
• "Document 1/16/1". People of Medieval Scotland, 1093–1371. n.d. Retrieved 29 May 2019.{{cite web}}: CS1 maint: year (link)
• "Document 1/7/164". People of Medieval Scotland, 1093–1371. n.d. Retrieved 13 June 2019.{{cite web}}: CS1 maint: year (link)
• "Document 3/30/1". People of Medieval Scotland, 1093–1371. n.d. Retrieved 2 November 2018.{{cite web}}: CS1 maint: year (link)
• "Document 3/32/1". People of Medieval Scotland, 1093–1371. n.d. Retrieved 2 November 2018.{{cite web}}: CS1 maint: year (link)
• "Document 3/32/2". People of Medieval Scotland, 1093–1371. n.d. Retrieved 2 November 2018.{{cite web}}: CS1 maint: year (link)
• Flateyjarbok: En Samling af Norske Konge-Sagaer med Indskudte Mindre Fortællinger om Begivenheder i og Udenfor Norse Same Annaler. Vol. 3. Oslo: P.T. Mallings Forlagsboghandel. 1868. OL 23388689M.
• Fornmanna Sögur. Vol. 9. Copenhagen: S. L. Möllers. 1835.
• Jónsson, F, ed. (1916). Eirspennill: Am 47 Fol. Oslo: Julius Thømtes Boktrykkeri. OL 18620939M.
• Kjær, A, ed. (1910). Det Arnamagnæanske Hanndskrift 81a Fol. (Skálholtsbók Yngsta). Oslo: Mallingske Bogtrykkeri. OL 25104944M.
• Luard, HR, ed. (1866). Annales Monastici. Rerum Britannicarum Medii Ævi Scriptores. Vol. 3. London: Longman's Green, Reader, and Dyer.
• MacDonald, A (1896). The Clan Donald. Vol. 1. Inverness: The Northern Counties Publishing Company.
• Macphail, JRN, ed. (1914). Highland Papers. Publications of the Scottish History Society. Vol. 1. Edinburgh: Scottish History Society. OL 23303390M.
• Michaelsson, E (2015). Böglunga Saga (Styttri Gerð) (MA thesis). Háskóli Íslands. hdl:1946/22667.
• Munch, PA; Goss, A, eds. (1874). Chronica Regvm Manniæ et Insvlarvm: The Chronicle of Man and the Sudreys. Vol. 1. Douglas, IM: Manx Society.
• Paul, JB, ed. (1882). Registrum Magni Sigilli Regum Scotorum: The Register of the Great Seal of Scotland, A.D. 1424–1513. Edinburgh: H.M. General Register House. OL 23329160M.
• "Regesta Norvegica". Dokumentasjonsprosjektet. n.d. Retrieved 1 July 2017.{{cite web}}: CS1 maint: year (link)
• Registrum Monasterii de Passelet, Cartas Privilegia Conventiones Aliaque Munimenta Complectens, A Domo Fundata A.D. MCLXIII Usque Ad A.D. MDXXIX. Edinburgh. 1832. OL 24829867M.
• Simpson, GG; Galbraith, JD, eds. (n.d.). Calendar of Documents Relating to Scotland. Vol. 5. Scottish Record Office.{{cite book}}: CS1 maint: year (link)
• Sinclair, J, ed. (1795). The Statistical Account of Scotland. Vol. 16. Edinburgh: William Creech.
• Stevenson, J, ed. (1839). Chronicon de Lanercost, M.CC.I.–M.CCC.XLVI. Edinburgh: The Bannatyne Club. OL 7196137M.
• Storm, G, ed. (1977) [1888]. Islandske Annaler Indtil 1578. Oslo: Norsk historisk kjeldeskrift-institutt. hdl:10802/5009. ISBN 82-7061-192-1.
• Sweetman, HS, ed. (1875). Calendar of Documents Relating to Ireland, Preserved in Her Majesty's Public Record Office, London, 1171–1251. London: Longman & Co.
• The Itinerary Through Wales and the Description of Wales. Everyman's Library. London: J. M. Dent & Sons. 1908. OL 24871133M.
• Thorpe, L, ed. (1978). The Journey Through Wales and the Description of Wales. Penguin Classics. Harmondsworth: Penguin Books. ISBN 9780140443394. OL 22125679M.
• Unger, CR, ed. (1871). Codex Frisianus: En Samling Af Norske Konge-Sagaer. Norske historiske kildeskriftfonds skrifter,9. Oslo: P.T. Mallings Forlagsboghandel. hdl:2027/hvd.32044084740760. OL 23385970M.
• Vigfusson, G, ed. (1878). Sturlunga Saga Including the Islendinga Saga of Lawman Sturla Thordsson and Other Works. Vol. 2. Oxford: Clarendon Press.
• Vigfusson, G, ed. (1887). Icelandic Sagas and Other Historical Documents Relating to the Settlements and Descents of the Northmen on the British Isles. Rerum Britannicarum Medii Ævi Scriptores. Vol. 2. London: Her Majesty's Stationery Office.

Secondary sources

• Argyll: An Inventory of the Monuments. Vol. 4. The Royal Commission on the Ancient and Historical Monuments of Scotland. 1982. ISBN 0-11-491728-0.
• Barrow, GWS (2006). "Skye From Somerled to A.D. 1500" (PDF). In Kruse, A; Ross, A (eds.). Barra and Skye: Two Hebridean Perspectives. Edinburgh: The Scottish Society for Northern Studies. pp. 140–154. ISBN 0-9535226-3-6. Archived from the original (PDF) on 4 March 2016. Retrieved 30 September 2017.
• Beuermann, I (2002). "Metropolitan Ambitions and Politics: Kells-Mellifont and Man & the Isles". Peritia. 16: 419–434. doi:10.1484/J.Peri.3.497. eISSN 2034-6506. ISSN 0332-1592.
• Beuermann, I (2012). The Norwegian Attack on Iona in 1209–10: The Last Viking Raid?. Iona Research Conference, April 10th to 12th 2012. pp. 1–10. Retrieved 22 February 2013.
• Beuermann, I (2010). "'Norgesveldet?' South of Cape Wrath? Political Views Facts, and Questions". In Imsen, S (ed.). The Norwegian Domination and the Norse World c. 1100–c. 1400. Trondheim Studies in History. Trondheim: Tapir Academic Press. pp. 99–123. ISBN 978-82-519-2563-1.
• Beuermann, I (2011). "Jarla Sǫgur Orkneyja. Status and Power of the Earls of Orkney According to Their Sagas". In Steinsland, G; Sigurðsson, JV; Rekdal, JE; Beuermann, I (eds.). Ideology and Power in the Viking and Middle Ages: Scandinavia, Iceland, Ireland, Orkney and the Faeroes. The Northern World: North Europe and the Baltic c. 400–1700 AD. Peoples, Economics and Cultures. Leiden: Brill. pp. 109–161. ISBN 978-90-04-20506-2. ISSN 1569-1462.
• Beuermann, I (2014). "No Soil for Saints: Why was There No Native Royal Martyr in Man and the Isles". In Sigurðsson, JV; Bolton, T (eds.). Celtic-Norse Relationships in the Irish Sea in the Middle Ages, 800–1200. The Northern World: North Europe and the Baltic c. 400–1700 AD. Peoples, Economics and Cultures. Leiden: Brill. pp. 81–95. ISBN 978-90-04-25512-8. ISSN 1569-1462.
• Boardman, S (2007). "The Gaelic World and the Early Stewart Court" (PDF). In Broun, D; MacGregor, M (eds.). Mìorun Mòr nan Gall, 'The Great Ill-Will of the Lowlander'? Lowland Perceptions of the Highlands, Medieval and Modern. Centre for Scottish and Celtic Studies, University of Glasgow. pp. 83–109. OCLC 540108870. Archived from the original (PDF) on 7 June 2011. Retrieved 14 July 2017.
• Broderick, G (2003). "Tynwald: A Manx Cult-Site and Institution of Pre-Scandinavian Origin?". Studeyrys Manninagh. ISSN 1478-1409. Archived from the original on 7 February 2009.
• Brown, D (2016). Hugh de Lacy, First Earl of Ulster: Rising and Fall in Angevin Ireland. Irish Historical Monographs. Woodbridge: The Boydell Press. ISBN 978-1-78327-134-4. ISSN 1740-1097.
• Brown, M (2004). The Wars of Scotland, 1214–1371. The New Edinburgh History of Scotland. Edinburgh: Edinburgh University Press. ISBN 0-7486-1238-6.
• Caldwell, DH; Hall, MA; Wilkinson, CM (2009). "The Lewis Hoard of Gaming Pieces: A Re-examination of Their Context, Meanings, Discovery and Manufacture". Medieval Archaeology. 53 (1): 155–203. doi:10.1179/007660909X12457506806243. eISSN 1745-817X. ISSN 0076-6097. S2CID 154568763.
• Carpenter, D (2003). The Struggle For Mastery: Britain 1066–1284 (EPUB). The Penguin History of Britain. London: Allen Lane. ISBN 978-0-14-193514-0.
• Cochran-Yu, DK (2015). A Keystone of Contention: The Earldom of Ross, 1215–1517 (PhD thesis). University of Glasgow.
• Cowan, EJ (1990). "Norwegian Sunset – Scottish Dawn: Hakon IV and Alexander III". In Reid, NH (ed.). Scotland in the Reign of Alexander III, 1249–1286. Edinburgh: John Donald Publishers. pp. 103–131. ISBN 0-85976-218-1.
• Crawford, BE (2013). The Northern Earldoms: Orkney and Caithness From 870 to 1470. Edinburgh: Birlinn Limited. ISBN 978-0-85790-618-2.
• Crawford, BE (2014). "The Kingdom of Man and the Earldom of Orkney—Some Comparisons". In Sigurðsson, JV; Bolton, T (eds.). Celtic-Norse Relationships in the Irish Sea in the Middle Ages, 800–1200. The Northern World: North Europe and the Baltic c. 400–1700 AD. Peoples, Economics and Cultures. Leiden: Brill. pp. 65–80. ISBN 978-90-04-25512-8. ISSN 1569-1462.
• Cubbon, W (1952). Island Heritage: Dealing With Some Phases of Manx History. Manchester: George Falkner & Sons. OL 24831804M.
• Donaldson, MEM (1923). Wanderings in the Western Highland and Islands. Paisley: Alexander Gardner.
• Downham, C (2008). "Review of RA McDonald, Manx Kingship in its Irish Sea Setting 1187–1229: King Rognvaldr and the Crovan Dynasty". The Medieval Review. ISSN 1096-746X.
• Duffy, S (1993). Ireland and the Irish Sea Region, 1014–1318 (PhD thesis). Trinity College Dublin. hdl:2262/77137.
• Duffy, S (2002). "The Bruce Brothers and the Irish Sea World, 1306–29". In Duffy, S (ed.). Robert the Bruce's Irish Wars: The Invasions of Ireland 1306–1329. Stroud: Tempus Publishing. pp. 45–70. ISBN 0-7524-1974-9.
• Duffy, S (2004). "Ragnvald (d. 1229)". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/50617. Retrieved 5 July 2011. (Subscription or UK public library membership required.)
• Dunbar, JG; Duncan, AAM (1971). "Tarbert Castle: A Contribution to the History of Argyll". Scottish Historical Review. 50 (1): 1–17. eISSN 1750-0222. ISSN 0036-9241. JSTOR 25528888.
• Duncan, AAM (1996) [1975]. Scotland: The Making of the Kingdom. The Edinburgh History of Scotland. Edinburgh: Mercat Press. ISBN 0-901824-83-6.
• Duncan, AAM; Brown, AL (1959). "Argyll and the Isles in the Earlier Middle Ages" (PDF). Proceedings of the Society of Antiquaries of Scotland. 90: 192–220. doi:10.9750/PSAS.090.192.220. eISSN 2056-743X. ISSN 0081-1564. S2CID 189977430.
• Fee, CR (2012). "Með Lögum Skal Land Vort Byggja (With Law Shall the Land be Built): Law as a Defining Characteristic of Norse Society in Saga Conflicts and Assembly Sites Throughout the Scandinavian North Atlantic". In Hudson, B (ed.). Studies in the Medieval Atlantic. The New Middle Ages. New York: Palgrave Macmillan. pp. 123–142. doi:10.1057/9781137062390_5. ISBN 978-1-137-06239-0.
• Fellows-Jensen, G (1998) [1998]. The Vikings and Their Victims: The Verdict of the Names (PDF). London: Viking Society for Northern Research. ISBN 978-0-903521-39-0.
• Flanagan, MT (2010). The Transformation of the Irish Church in the Twelfth and Thirteenth Centuries. Studies in Celtic History. Woodbridge: The Boydell Press. ISBN 978-1-84383-597-4. ISSN 0261-9865.
• Forbes, AR (1923). Place-Names of Skye and Adjacent Islands. Paisley: Alexander Gardner.
• Forte, A; Oram, RD; Pedersen, F (2005). Viking Empires. Cambridge: Cambridge University Press. ISBN 978-0-521-82992-2.
• Gade, KE (1994). "1236: Órækja Meiddr ok Heill Gerr" (PDF). In Tómasson, S (ed.). Samtíðarsögur: The Contemporary Sagas. Forprent. Reykjavík: Stofnun Árna Magnússona. pp. 194–207.
• Gillingham, J (2004) [1999]. "Killing and Mutilating Political Enemies in the British Isles From the Late Twelfth to the Early Fourteenth Century: A Comparative Study". In Smith, B (ed.). Britain and Ireland 900–1300: Insular Responses to Medieval European Change. Cambridge: Cambridge University Press. pp. 114–134. ISBN 0-511-03855-0.
• Grant, A (2000). "The Province of Ross and the Kingdom of Alba". In Cowan, EJ; McDonald, RA (eds.). Alba: Celtic Scotland in the Middle Ages. East Linton: Tuckwell Press. pp. 88–126. ISBN 1-86232-151-5.
• Harrison, A (2002). "Sources for the Documentary History of Peel Castle". In Freke, D (ed.). Excavations on St Patrick's Isle, Peel, Isle of Man 1982–88: Prehistoric, Viking, Medieval and Later. Centre for Manx Studies Monographs. Liverpool: Liverpool University Press. pp. 15–23. ISBN 0-85323-336-5.
• Imsen, S (2010). "Introduction". In Imsen, S (ed.). The Norwegian Domination and the Norse World c. 1100–c. 1400. Trondheim Studies in History. Trondheim: Tapir Academic Press. pp. 13–33. ISBN 978-82-519-2563-1.
• Wilson, DM (1973). "Manx Memorial Stones of the Viking Period" (PDF). Saga-Book. 18: 1–18.
• Insley, J; Wilson, D (2006). "Tynwald". Germanische Altertumskunde Online. De Gruyter. Retrieved 7 March 2015.
• Johnsen, AO (1969). "The Payments From the Hebrides and Isle of Man to the Crown of Norway, 1153–1263: Annual Ferme or Feudal Casualty?". Scottish Historical Review. 48 (1): 18–64. eISSN 1750-0222. ISSN 0036-9241. JSTOR 25528786.
• Kermode, PMC (1916). "Further Discoveries of Cross-Slabs in the Isle of Man" (PDF). Proceedings of the Society of Antiquaries of Scotland. 50: 50–62. doi:10.9750/PSAS.050.50.62. eISSN 2056-743X. ISSN 0081-1564. S2CID 223924724.
• Lewis, S (1987), The Art of Matthew Paris in Chronica Majora, California Studies in the History of Art, Berkeley and Los Angeles: University of California Press, ISBN 0-520-04981-0, OL 3163004M
• MacInnes, IA (2019). "'A Somewhat too Cruel Vengeance was Taken for the Blood of the Slain': Royal Punishment of Rebels, Traitors, and Political Enemies in Medieval Scotland, c.1100–c.1250". In Tracy, L (ed.). Treason: Medieval and Early Modern Adultery, Betrayal, and Shame. Explorations in Medieval Culture. Leiden: Brill. pp. 119–146. ISBN 978-90-04-40069-6. ISSN 2352-0299. LCCN 2019017096.
• MacLeod, N (2002). Raasay: The Island and its People. Edinburgh: Birlinn Limited. ISBN 1-84158-235-2.
• Matheson, W (1978–1980). "The Ancestry of the MacLeods". Transactions of the Gaelic Society of Inverness. 51: 68–80.
• McDonald, RA (1997). The Kingdom of the Isles: Scotland's Western Seaboard, c. 1100–c. 1336. Scottish Historical Monographs. East Linton: Tuckwell Press. ISBN 978-1-898410-85-0.
• McDonald, RA (2004). "Coming in From the Margins: The Descendants of Somerled and Cultural Accommodation in the Hebrides, 1164–1317". In Smith, B (ed.). Britain and Ireland, 900–1300: Insular Responses to Medieval European Change. Cambridge: Cambridge University Press. pp. 179–198. ISBN 0-511-03855-0.
• McDonald, RA (2007a). "Dealing Death From Man: Manx Sea Power in and around the Irish Sea, 1079–1265". In Duffy, S (ed.). The World of the Galloglass: Kings, Warlords and Warriors in Ireland and Scotland, 1200–1600. Dublin: Four Courts Press. pp. 45–76. ISBN 978-1-85182-946-0.
• McDonald, RA (2007b). Manx Kingship in its Irish Sea Setting, 1187–1229: King Rǫgnvaldr and the Crovan Dynasty. Dublin: Four Courts Press. ISBN 978-1-84682-047-2.
• McDonald, RA (2008). "Man, Ireland, and England: The English Conquest of Ireland and Dublin-Manx Relations". In Duffy, S (ed.). Medieval Dublin. Vol. 8. Dublin: Four Courts Press. pp. 131–149. ISBN 978-1-84682-042-7.
• McDonald, RA (2012). "The Manx Sea Kings and the Western Oceans: The Late Norse Isle of Man in its North Atlantic Context, 1079–1265". In Hudson, B (ed.). Studies in the Medieval Atlantic. The New Middle Ages. New York: Palgrave Macmillan. pp. 143–184. doi:10.1057/9781137062390_6. ISBN 978-1-137-06239-0.
• McDonald, RA (2016). "Sea Kings, Maritime Kingdoms and the Tides of Change: Man and the Isles and Medieval European Change, AD c1100–1265". In Barrett, JH; Gibbon, SJ (eds.). Maritime Societies of the Viking and Medieval World. The Society for Medieval Archaeology Monograph. Milton Park, Abingdon: Routledge. pp. 333–349. doi:10.4324/9781315630755. ISBN 978-1-315-63075-5. ISSN 0583-9106.
• McDonald, RA (2019). Kings, Usurpers, and Concubines in the Chronicles of the Kings of Man and the Isles. Cham: Palgrave Macmillan. doi:10.1007/978-3-030-22026-6. ISBN 978-3-030-22026-6. S2CID 204624404.
• McGrail, MJ (1995). The Language of Authority: The Expression of Status in the Scottish Medieval Castle (MA thesis). McGill University.
• McLeod, W (2002). "Rí Innsi Gall, Rí Fionnghall, Ceannas nan Gàidheal: Sovereignty and Rhetoric in the Late Medieval Hebrides". Cambrian Medieval Celtic Studies. 43: 25–48. ISSN 1353-0089.
• McNamee, C (2005). "Olaf (1173/4–1237)". Oxford Dictionary of National Biography (May 2005 ed.). Oxford University Press. doi:10.1093/ref:odnb/20672. Retrieved 5 July 2011. (Subscription or UK public library membership required.)
• Megaw, B (1976). "Norseman and Native in the Kingdom of the Isles: A Reassessment of the Manx Evidence". Scottish Studies: The Journal of the School of Scottish Studies, University of Edinburgh. 20: 1–44. ISSN 0036-9411.
• Munro, R; Munro, J (2008). "Ross Family (per. c.1215–c.1415)". Oxford Dictionary of National Biography (October 2008 ed.). Oxford University Press. doi:10.1093/ref:odnb/54308. ISBN 978-0-19-861411-1. Retrieved 5 July 2011. (Subscription or UK public library membership required.)
• Murray, N (2005). "Swerving From the Path of Justice". In Oram, RD (ed.). The Reign of Alexander II, 1214–49. The Northern World: North Europe and the Baltic c. 400–1700 AD. Peoples, Economics and Cultures. Leiden: Brill. pp. 285–305. ISBN 90-04-14206-1. ISSN 1569-1462.
• Neville, CJ (2016). "The Beginnings of Royal Pardon in Scotland". Journal of Medieval History. 42 (5): 1–29. doi:10.1080/03044181.2016.1212250. eISSN 1873-1279. ISSN 0304-4181. S2CID 157655719.
• O'Grady, J (2008). The Setting and Practice of Open-Air Judicial Assemblies in Medieval Scotland: A Multidisciplinary Study (PhD thesis). University of Glasgow.
• Oram, RD (1988). The Lordship of Galloway, c. 1000 to c. 1250 (PhD thesis). University of St Andrews. hdl:10023/2638.
• Oram, RD (2000). The Lordship of Galloway. Edinburgh: John Donald. ISBN 0-85976-541-5.
• Oram, RD (2004). "Thomas, Earl of Atholl (d. 1231)". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/49364. Retrieved 5 July 2011. (Subscription or UK public library membership required.)
• Oram, RD (2005). "Introduction: An Overview of the Reign of Alexander II". In Oram, RD (ed.). The Reign of Alexander II, 1214–49. The Northern World: North Europe and the Baltic c. 400–1700 AD. Peoples, Economics and Cultures. Leiden: Brill. pp. 1–47. ISBN 90-04-14206-1. ISSN 1569-1462.
• Oram, RD (2011). Domination and Lordship: Scotland 1070–1230. The New Edinburgh History of Scotland. Edinburgh: Edinburgh University Press. ISBN 978-0-7486-1496-7. Archived from the original on 18 June 2019. Retrieved 13 June 2019.
• Oram, RD (2013) [2012]. Alexander II, King of Scots, 1214–1249. Edinburgh: Birlinn. ISBN 978-1-907909-05-4.
• Ó Cróinín, D (2017) [1995]. Early Medieval Ireland, 400–1200 (2nd ed.). Milton Park, Abingdon: Routledge. ISBN 978-1-315-55878-3.
• Pollock, M (2005). "Rebels of the West, 1209–1216". Cambrian Medieval Celtic Studies. 50: 1–30. ISSN 1353-0089.
• Power, R (2005). "Meeting in Norway: Norse-Gaelic Relations in the Kingdom of Man and the Isles, 1090–1270" (PDF). Saga-Book. 29: 5–66. ISSN 0305-9219.
• Pringle, D (1998). "Rothesay Castle and the Stewarts". Journal of the British Archaeological Association. 151 (1): 149–169. doi:10.1179/jba.1998.151.1.149. eISSN 1747-6704. ISSN 0068-1288.
• Raven, JA (2005). Medieval Landscapes and Lordship in South Uist (PhD thesis). Vol. 1. University of Glasgow.
• Rixson, D (1982). The West Highland Galley. Edinburgh: Birlinn. ISBN 1-874744-86-6.
• Ross, A (2007). "Moray, Ulster, and the MacWilliams". In Duffy, S (ed.). The World of the Galloglass: Kings, Warlords and Warriors in Ireland and Scotland, 1200–1600. Dublin: Four Courts Press. pp. 24–44.
• Ross, AD (2003). The Province of Moray, c. 1000–1230 (PhD thesis). Vol. 1. University of Aberdeen.
• Sawyer, PH (1982). Kings and Vikings: Scandinavia and Europe, 700–1100. London: Methuen. ISBN 0-416-74180-0.
• Schach, P (2016) [1993]. "Hákonar Saga Gamla Hákonarsonar". In Pulsiano, P; Wolf, K (eds.). Medieval Scandinavia: An Encyclopedia. Routledge Revivals. Milton Park, Abingdon: Routledge. pp. 259–260.
• Sellar, WDH (1997–1998). "The Ancestry of the MacLeods Reconsidered". Transactions of the Gaelic Society of Inverness. 60: 233–258.
• Sellar, WDH; Maclean, A (1999). The Highland Clan MacNeacail (MacNicol): A History of the Nicolsons of Scorrybreac. Lochbay: Maclean Press. ISBN 1-899272-02-X.
• Sellar, WDH (2000). "Hebridean Sea Kings: The Successors of Somerled, 1164–1316". In Cowan, EJ; McDonald, RA (eds.). Alba: Celtic Scotland in the Middle Ages. East Linton: Tuckwell Press. pp. 187–218. ISBN 1-86232-151-5.
• "Skye, Eilean Chaluim Chille". Canmore. n.d. Retrieved 25 June 2017.{{cite web}}: CS1 maint: year (link)
• Smith, JS (1998). "Review of RA McDonald, The Kingdom of the Isles – Scotland's Western Seaboard, c.1100–c.1336". Northern Scotland. 18 (1): 109–112. doi:10.3366/nor.1998.0010. eISSN 2042-2717. ISSN 0306-5278.
• Steinsland, G; Sigurðsson, JV; Rekdal, JE; Beuermann, I, eds. (2011). "Index". Ideology and Power in the Viking and Middle Ages: Scandinavia, Iceland, Ireland, Orkney and the Faeroes. The Northern World: North Europe and the Baltic c. 400–1700 AD. Peoples, Economics and Cultures. Leiden: Brill. pp. 387–405. ISBN 978-90-04-20506-2. ISSN 1569-1462.
• Stell, G (2000). "War-Damaged Castles: The Evidence From Medieval Scotland". Château Gaillard. Vol. 19. Caen: CRAM. pp. 275–286. ISBN 2-902685-09-2.
• Stevenson, JH (1914). Heraldry in Scotland. Vol. 1. Glasgow: James Maclehose and Sons. OL 24871335M.
• Strickland, MJ (2012). "The Kings of Scots at War, c. 1093–1286". In Spiers, EM; Crang, JA; Strickland, MJ (eds.). A Military History of Scotland. Edinburgh: Edinburgh University Press. pp. 94–132. ISBN 978-0-7486-3204-6.
• Stringer, K (2004). "Alexander II (1198–1249)". Oxford Dictionary of National Biography (online ed.). Oxford University Press. doi:10.1093/ref:odnb/322. Retrieved 5 July 2011. (Subscription or UK public library membership required.)
• Stringer, KJ (1998) [1993]. "Periphery and Core in Thirteenth-Century Scotland: Alan Son of Roland, Lord of Galloway and Constable of Scotland". In Grant, A; Stringer, KJ (eds.). Medieval Scotland: Crown, Lordship and Community. Edinburgh: Edinburgh University Press. pp. 82–113. ISBN 0-7486-1110-X.
• Stringer, KJ (2000). "Reform Monasticism and Celtic Scotland: Galloway, c.1140–c.1240". In Cowan, EJ; McDonald, RA (eds.). Alba: Celtic Scotland in the Middle Ages. East Linton: Tuckwell Press. pp. 127–165. ISBN 1-86232-151-5.
• Tabraham, C (2005) [1997]. Scotland's Castles. London: BT Batsford. ISBN 0-7134-8943-X.
• The Royal Commission on Ancient and Historical Monuments & Constructions of Scotland: Ninth Report With Inventory of Monuments and Constructions in the Outer Hebrides, Skye and the Small Isles. Edinburgh: His Majesty's Stationery Office. 1928.
• Thomas, S (2015). "From cathedral of the Isles to obscurity - the archaeology and history of Skeabost Island, Snizort" (PDF). Proceedings of the Society of Antiquaries of Scotland. 144: 245–264. doi:10.9750/PSAS.144.245.264. eISSN 2056-743X. ISSN 0081-1564. S2CID 220620368.
• Tremlett, TD; London, HS; Wagner, A (1967). Rolls of Arms: Henry III. Publications of the Harleian Society. London: Harleian Society.
• Valante, MA (2010). "Review of RA McDonald, Manx Kingship in Its Irish Sea Setting, 1187–1229: King Rǫgnvaldr and the Crovan Dynasty". Speculum. 85 (1): 171–172. doi:10.1017/S0038713409990418. eISSN 2040-8072. ISSN 0038-7134. JSTOR 27866810.
• Veach, C (2014). Lordship in Four Realms: The Lacy Family, 1166–1241. Manchester Medieval Studies. Manchester: Manchester University Press. ISBN 978-0-7190-8937-4.
• Williams, DGE (1997). Land Assessment and Military Organisation in the Norse Settlements in Scotland, c.900–1266 AD (PhD thesis). University of St Andrews. hdl:10023/7088.
• Woolf, A (2003). "The Diocese of the Sudreyar". In Imsen, S (ed.). Ecclesia Nidrosiensis, 1153–1537: Søkelys på Nidaroskirkens og Nidarosprovinsens Historie. Tapir Akademisk Forlag. pp. 171–181. ISBN 978-82-519-1873-2.
• Woolf, A (2004). "The Age of Sea-Kings, 900–1300". In Omand, D (ed.). The Argyll Book. Edinburgh: Birlinn. pp. 94–109. ISBN 1-84158-253-0.
• Woolf, A (2007). "A Dead Man at Ballyshannon". In Duffy, S (ed.). The World of the Galloglass: Kings, Warlords and Warriors in Ireland and Scotland, 1200–1600. Dublin: Four Courts Press. pp. 77–85. ISBN 978-1-85182-946-0.

• Media related to Guðrøðr Rǫgnvaldsson at Wikimedia Commons