| | | | William Willoughby c. 1370–1409 5th Baron Willoughby de Eresby |
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Robert Willoughby c. 1385–1452 6th Baron Willoughby de Eresby | | | | | | Thomas Willoughby | | Lionel (de) Welles c. 1406–1461 6th Baron Welles | | | | | | Margaret Beauchamp c. 1410 – c. 1482 |
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Joan Willoughby c. 1425–bef. 1462 7th Baroness Willoughby de Eresby | | Richard Welles c. 1428–1470 7th Baron Welles | | Robert Willoughby d. 1465 | | Cecily Welles | | | | | | | Edward IV 1442–1483 | | Margaret Beaufort 1443–1509 |
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Robert Welles d. 1470 8th Baron Willoughby de Eresby | | Joan Welles d. bef. 1475 9th Baron Willoughby de Eresby | | Christopher Willoughby 1453–1498/1499 10th Baron Willoughby de Eresby | | John Welles c. 1450–1498 1st Viscount Welles | | Cecily 1469–1507 | | Elizabeth 1466–1503 | | Henry VII of England 1457–1509 |
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| | | | | | | | William Willoughby 1482–1526 11th Baron Willoughby de Eresby | | | Charles Brandon c. 1484–1545 1st Duke of Suffolk | | Mary Tudor 1496–1533 | | Louis XII of France 1462–1515 | | Henry VIII of England 1491–1547 |
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| | | | Richard Bertie 1516–1582 | | Katherine Brandon 1519–1580 12th Baroness Willoughby de Eresby | | | | | | | Frances Grey 1517–1559 Duchess of Suffolk |
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| | | | Baron Norreys of Rycote, 1572 | | | | | | | | | | | | | | |
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| | | | Henry Norris (c. 1530–1601) 1st Baron Norreys | | Peregrine Bertie 1555–1601 13th Baron Willoughby de Eresby | | | | | | Lady Jane Grey 1536/1537–1554 |
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| | | | Earl of Berkshire and Viscount Thame, 1621 | | Earl of Lindsey, 1626 |
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| | | | Francis Norris 1582–1624 Earl of Berkshire, 2nd Baron Norreys, and Viscount Thame | | Robert Bertie 1582–1642 1st Earl of Lindsey, 14th Baron Willoughby de Eresby |
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| | | | Earldom of Berkshire and Viscountcy Thame extinct, 1624 | | | | | |
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| | | | Elizabeth Wray d. 1645 3rd Baroness Norreys | | | | | |
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| | | | Bridget Bertie 1627–1657 4th Baroness Norreys | | Montagu Bertie 1608–1666 2nd Earl of Lindsey, 15th Baron Willoughby de Eresby | | Martha Cockayne |
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| | | | Earl of Abingdon, 1682 | | | | | | | | | | | | | | | | | | | | | | |
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| | | | James Bertie 1653–1669 1st Earl of Abingdon, 5th Baron Norreys | | | | | | Robert Bertie 1630–1701 3rd Earl of Lindsey, 16th Baron Willoughby de Eresby | | | | | | | | | | Charles Bertie c. 1635 – c. 1710 |
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| | | | | | | | | | | | | | Duke of Ancaster and Kesteven and Marquess of Lindsey, 1706 | | | | | | | | | | | | | |
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Montagu Venables-Bertie 1673–1743 2nd Earl of Abingdon, 6th Baron Norreys | | James Bertie 1674–1735 | | | | | | Robert Bertie 1660–1723 1st Duke of Ancaster and Kesteven and Marquess of Lindsey, 4th Earl of Lindsey, 17th Baron Willoughby de Eresby | | | | | | | | | | Charles Bertie c. 1678 – c. 1730 |
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| | | | Willoughby Bertie 1692–1760 3rd Earl of Abingdon, 7th Baron Norreys | | | | | | Peregrine Bertie 1686–1742 2nd Duke of Ancaster and Kesteven and Marquess of Lindsey, 5th Earl of Lindsey, 18th Baron Willoughby de Eresby | | | | | | | | | | | | | |
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| | | | | | | | | | | | | Peregrine Bertie 1714–1778 3rd Duke of Ancaster and Kesteven and Marquess of Lindsey, 6th Earl of Lindsey, 19th Baron Willoughby de Eresby | | | | | | Brownlow Bertie 1729–1809 5rd Duke of Ancaster and Kesteven and Marquess of Lindsey, 8th Earl of Lindsey | | Peregrine Bertie c. 1709 – c. 1779 |
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| | | | | | | | | | | | | | | | | | | Baron Gwydyr, 1796 | | Dukedom of Ancaster and Kesteven and Marquessate of Lindsey extinct, 1809 | | | | | |
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| | | | Willoughby Bertie 1740–1799 4th Earl of Abingdon, 8th Baron Norreys | | Robert Bertie 1756–1779 4th Duke of Ancaster and Kesteven and Marquess of Lindsey, 7th Earl of Lindsey, 20th Baron Willoughby de Eresby | | Priscilla Bertie 1761–1828 21st Baroness Willoughby de Eresby | | Peter Burrell 1754–1820 1st Baron Gwydyr | | | | | | Albemarle Bertie 1744–1818 9th Earl of Lindsey |
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| | | | Montagu Bertie 1784–1854 5th Earl of Abingdon, 9th Baron Norreys | | | | | | Peter Drummond-Burrell 1782–1865 22nd Baron Willoughby de Eresby, 2nd Baron Gwydyr | | | | | | Lindsey Merrik Peter Burrell | | | | | |
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| | | | | | | | | Baron Aveland, 1856 | | | | | | | | | | | | | | | | | | | | | | | | | |
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| | | | Montagu Bertie 1808–1884 6th Earl of Abingdon, 10th Baron Norreys | | Gilbert Heathcote 1794–1867 1st Baron Aveland | | Clementina Drummond-Willoughby 1809–1888 24th Baron Willoughby de Eresby | | Albyric Drummond-Willoughby 1821–1870 23rd Baron Willoughby de Eresby, 3rd Baron Gwydyr | | Peter Robert Burrell 1810–1909 4th Baron Gwydyr | | George Augustus Frederick Albemarle Bertie 1814–1877 10th Earl of Lindsey | | Montague Peregrine Bertie 1815–1899 11th Earl of Lindsey |
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| | | | | | | | | Baron Bertie of Thame, 1915 Viscount Bertie of Thame, 1918 | | Earl of Ancaster, 1892 | | | | | | | | | | | | | | | | | | |
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Montagu Arthur Bertie 1836–1928 7th Earl of Abingdon | | | | | | Viscount Bertie of Thame 1844–1919 1st Viscount Bertie of Thame and Baron Bertie of Thame | | Gilbert Heathcote-Drummond-Willoughby 1830–1910 1st Earl of Ancaster, 25th Baron Willoughby de Eresby, 2nd Baron Aveland | | | | | | Willoughby Merrik Campbell Burrell 1841–1915 5th Baron Gwydyr | | | | | | | | | |
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Montagu Charles Francis Bertie 1860–1919 | | | | | | | Vere Frederick Bertie 1878–1954 2nd Viscount Bertie of Thame and Baron Bertie of Thame | | Gilbert Heathcote-Drummond-Willoughby 1867–1951 2nd Earl of Ancaster, 26th Baron Willoughby de Eresby, 3rd Baron Aveland | | | | | | | | | | | | | | Montague Peregrine Albemarle Bertie 1861–1938 12th Earl of Lindsey |
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| | | | | | | | | | Viscountcy and Barony Bertie of Thame extinct, 1954 | | | | | |
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Montagu Henry Edmund Cecil Towneley-Bertie 1887–1963 13th Earl of Lindsey, 8th Earl of Abingdon | | Arthur Michael Cosmo Bertie 1886–c. 1954–1957 | | | | | | Gilbert James Heathcote-Drummond-Willoughby 1907–1983 3rd Earl of Ancaster, 27th Baron Willoughby de Eresby, 4th Baron Aveland |
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| | | | | | | | | | | | | Earldom of Ancaster and Barony of Aveland extinct, 1983 |
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| | | | Richard Henry Rupert Bertie b. 1931 14th Earl of Lindsey, 9th Earl of Abingdon | | | | | | Nancy Jane Marie Heathcote-Drummond-Willoughby b. 1934 28th Baroness Willoughby de Eresby |
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