Alfonso of Brienne

Coat of arms of Alphonso

Alfonso of Brienne, called Alphonse d'Acre (c. 1220 – 14 September 1270), was the son of John of Brienne and Berengaria of León, born in Acre.

Alfonso took part in the Seventh Crusade (1248) as a squire. By his marriage (before 1250) to Marie, Countess of Eu he became Count of Eu. He was also Grand Chamberlain of France. He died on 14 September 1270 in Tunis on the Eighth Crusade in the same epidemic that claimed King Louis IX.

He had at least two children by Marie:

• John I of Brienne, Count of Eu
• Blanche (d. 1338), Abbess of Maubuisson

Ancestry

Ancestors of Alfonso of Brienne

16. Erard I of Brienne 8. Gautier II of Brienne 17. Alix of Roucy-Ramerupt 4. Erard II of Brienne 18. John I, Count of Soissons 9. Adele of Soissons 19. Aveline de Pierrefonds 2. John of Brienne 20. Richard II of Montfaucon 10. Amadeus II of Montfaucon 21. Sophie of Montbéliard 5. Agnes of Montfaucon 11. Beatrice of Grandson-Joinville 1. Alphonso of Brienne 24. Alfonso VII of León and Castile 12. Ferdinand II of León 25. Berenguela of Barcelona 6. Alfonso IX of León 26. Afonso I of Portugal 13. Urraca of Portugal 27. Maud of Savoy 3. Berengaria of León 28. Sancho III of Castile 14. Alfonso VIII of Castile 29. Blanche of Navarre 7. Berenguela of Castile 30. Henry II of England 15. Eleanor of England 31. Eleanor of Aquitaine

Sources

• Perry, Guy (2018). The Briennes: The Rise and Fall of a Champenois Dynasty in the Age of the Crusades, c. 950-1356. Cambridge University Press.
• Pollock, M. A. (2015). Scotland, England and France After the Loss of Normandy, 1204-1296. The Boydell Press.