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Bentinck Family Tree: Earls of Portland , Dukes of Portland and Counts Bentinck
Earl of Portland , 1689
Hans William Bentinck 1649–17091st Earl of Portland
Duke of Portland , 1715Count Bentinck , 1732
Willem Bentinck 1681–1689 Henry Bentinck 1682–17261st Duke of Portland 2nd Earl of Portland William Bentinck 1704–17741st Count Bentinck
William Bentinck 1709–17622nd Duke of Portland, 3rd Earl of Portland Christian Frederick Anthony Bentinck 1734–1768
William Henry Cavendish-Bentinck 1738–18093rd Duke of Portland, 4th Earl of Portland William Gustavus Frederic Bentinck 1762–18352nd Count Bentinck John Charles Bentinck 1763–18333rd Count Bentinck
William Henry Cavendish-Scott-Bentinck 1768–18544th Duke of Portland, 5th Earl of Portland Lord William Charles Augustus Cavendish-Bentinck 1780–1826Lord Frederick Cavendish-Bentinck 1781–1828 Charles Anthony Ferdinand Bentinck 1792–18644th Count Bentinck
William Henry Cavendish-Scott-Bentinck 1796–1824 Marquess of TitchfieldWilliam John Cavendish-Scott-Bentinck 1800–18795th Duke of Portland, 6th Earl of Portland Arthur Cavendish-Bentinck 1819–1877 George Augustus Frederick Cavendish-Bentinck 1821–1891Henry Charles Adolphus Frederick William Bentinck 1846–19035th Count Bentinck William Charles Philip Otto Bentinck 1848–19126th Count Bentinck Count Godard John George Charles Bentinck 1857–1940
William John Arthur Charles James Cavendish-Bentinck 1857–19436th Duke of Portland, 7th Earl of Portland William George Frederick Cavendish-Bentinck 1856–1948 Count Robert Charles Bentinck 1875–1932 William Frederick Charles Henry Bentinck 1880–19587th Count Bentinck Charles Arthur Reynard William Godard Augustus Bentinck 1885–19648th Count Bentinck Godard Adrian Henry Julius Bentinck 1887–19689th Count Bentinck
William Arthur Henry Cavendish-Bentinck 1893–19777th Duke of Portland, 8th Earl of Portland Ferdinand William Cavendish-Bentinck 1888–19808th Duke of Portland, 9th Earl of Portland Victor Frederick William Cavendish-Bentinck 1897–19909th Duke of Portland, 10th Earl of Portland [ 1] Henry Noel Bentinck 1919–199711th Earl of Portland, 10th Count Bentinck
William James Cavendish-Bentinck 1925–1966 Timothy Charles Robert Noel Bentinck 12th Earl of Portland, 11th Count Bentinck b. 1953
William Jack Henry Bentinck b. 1984 Viscount WoodstockJasper James Mellowes Bentinck (born 1988)
^ The Dukedom of Portland became extinct upon the 9th Duke's death and the Earldom of Portland reverted to the male line of the 1st Earl of Portland with Henry Noel acceding as 11th Earl of Portland.