| | | | | | | | Earl of Portland, 1689 |
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| | | | | | | | Hans William Bentinck 1649–1709 1st Earl of Portland |
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| | | | | Duke of Portland, 1715 | | | | | | | | | | Count Bentinck, 1732 |
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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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