.. 1 King Edward III of England (1312 - 1377)
.. + Philippa de Hainault (1314 - 1369)
.... 2 Sir John of Gaunt (1340 - 1399)
.... + Katherine de Roet (1350 - 1403)
...... 3 Joan Beaufort (1379 - 1440)
...... + Sir Ralph de Neville (1364 - 1425)
........ 4 Sir Richard Neville (1400 - 1460)
........ + Alice Montacute (1408 - 1462)
.......... 5 Katherine Neville (1435 - 1503)
.......... + Sir William Bonville (1442 - 1460)
............ 6 Cecily Bonville (1461 - 1529)
............ + Sir Thomas Grey (1453 - 1501)
.............. 7 Mary Grey ( - 1538) [1]
.............. + Sir Walter Devereux (1491 - 1558) [2]
................ 8 Sir William Devereux (1525 - 1579)
................ + Jane Scudamore
.................. 9 Margaret Devereux
.................. + N.N. Littlejohn
.................... 10 Mary Littlejohn
.................... + N.N. Fowler
...................... 11 William Fowler
...................... + N.N.
........................ 12 Richard Fowler
........................ + N.N.
.......................... 13 Francis Leveson Fowler
.......................... + Anne Venables (1639 - 1715)
............................ 14 Frances Fowler ( - 1723)
............................ + Thomas Needham (1658 - 1687)
.............................. 15 Sir Robert Needham (1683 - 1710)
.............................. + Mary Offley
................................ 16 Sir John Needham (1710 - 1791)
................................ + Anne Hurlstone (1711 - 1786)
.................................. 17 Sir Francis Needham (1748 - 1832)
.................................. + Anne Fisher (1760 - 1816)
.................................... 18 Anna Maria Elizabeth Needham (1790 - 1866)
.................................... + Henry Cockayne Cust (1780 - 1861)
...................................... 19 Henry Francis Cockayne-Cust (1819 - 1884)
...................................... + Sara Jane Cookson (1822 - 1867)
........................................ 20 Harry Cust (1861 - 1917)
........................................ + N.N.
.......................................... 21 Beatrice Ethel Stephenson (1888 - 1960)
.......................................... + Alfred Ebenezer Roberts (1892 - 1970)
............................................ 22 Lady Margaret Thatcher (1925 - 2013)


.... 2 Edmund Plantagenet (1344 - 1402)
.... + Isabella de Castile (1355 - 1393)
...... 3 Sir Richard Plantagenet (1376 - 1415)
...... + Anne Mortimer (1390 - 1411)
........ 4 Isabel Plantagenet (1409 - 1484) [3]
........ + Sir Henry Bourchier (1409 - 1483) [4]
.......... 5 Sir William Bourchier ( - 1471)
.......... + Anne Wydeville (1438 - 1489)
............ 6 Cecily Bourchier ( - 1493)
............ + Sir John Devereux (1464 - 1501) [2]
.............. 7 Sir Walter Devereux (1491 - 1558) [1]
.............. + Mary Grey ( - 1538)


.... 2 Sir Thomas Plantagenet (1355 - 1397)
.... + Alianore de Bohun (1366 - 1399)
...... 3 Anne Plantagenet (1383 - 1438)
...... + Sir William Bourchier (1374 - 1420)
........ 4 Sir Henry Bourchier (1409 - 1483) [4]
........ + Isabel Plantagenet (1409 - 1484) [3]