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| Bentinck Family Tree: Earls of Portland, Dukes of Portland and Counts Bentinck
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| | | | | | | | Earl of Portland, 1689 | |
| | | | | | | | Hans William Bentinck
1649–1709
1st Earl of Portland | |
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| | | | | Duke of Portland, 1715 | | | | | | | | | | Count Bentinck, 1732 | |
Willem Bentinck
1681–1689 | | Henry Bentinck
1682–1726
1st Duke of Portland
2nd Earl of Portland | | | | | | | | | | William Bentinck
1704–1774
1st Count Bentinck | |
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| | | | William Bentinck
1709–1762
2nd Duke of Portland, 3rd Earl of Portland | | | | | | | | | | Christian Frederick Anthony Bentinck
1734–1768 | |
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| | | | William Henry Cavendish-Bentinck
1738–1809
3rd Duke of Portland, 4th Earl of Portland | | | | | | | | | | William Gustavus Frederic Bentinck
1762–1835
2nd Count Bentinck | | John Charles Bentinck
1763–1833
3rd Count Bentinck | |
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| | | | William Henry Cavendish-Scott-Bentinck
1768–1854
4th Duke of Portland, 5th Earl of Portland | | Lord William Charles Augustus Cavendish-Bentinck
1780–1826 | | Lord Frederick Cavendish-Bentinck
1781–1828 | | | | | | Charles Anthony Ferdinand Bentinck
1792–1864
4th Count Bentinck | |
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William Henry Cavendish-Scott-Bentinck
1796–1824
Marquess of Titchfield | | William John Cavendish-Scott-Bentinck
1800–1879
5th Duke of Portland, 6th Earl of Portland | | Arthur Cavendish-Bentinck
1819–1877 | | George Augustus Frederick Cavendish-Bentinck
1821–1891 | | | | | | Henry Charles Adolphus Frederick William Bentinck
1846–1903
5th Count Bentinck | | William Charles Philip Otto Bentinck
1848–1912
6th Count Bentinck | | Count Godard John George Charles Bentinck
1857–1940 | |
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| | | | | | | | William John Arthur Charles James Cavendish-Bentinck
1857–1943
6th 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
1880–1958
7th Count Bentinck | | Charles Arthur Reynard William Godard Augustus Bentinck
1885–1964
8th Count Bentinck | | Godard Adrian Henry Julius Bentinck
1887–1968
9th Count Bentinck | |
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| | | | | | | | William Arthur Henry Cavendish-Bentinck
1893–1977
7th Duke of Portland, 8th Earl of Portland | | Ferdinand William Cavendish-Bentinck
1888–1980
8th Duke of Portland, 9th Earl of Portland | | Victor Frederick William Cavendish-Bentinck
1897–1990
9th Duke of Portland, 10th Earl of Portland[1] | | Henry Noel Bentinck
1919–1997
11th Earl of Portland, 10th Count Bentinck | |
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| | | | | | | | | | | | | | | | William James Cavendish-Bentinck
1925–1966 | | Timothy Charles Robert Noel Bentinck
12th Earl of Portland, 11th Count Bentinck
b. 1953 | |
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| | | | | | | | | | | | | | | | | | | | William Jack Henry Bentinck
b. 1984
Viscount Woodstock | | Jasper James Mellowes Bentinck
(born 1988) | |
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- ^ 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.
