1 King Edward III of England (1312 - 1377)
.. + Philippa de Hainault (about 1314 - 1369)
....2 Sir John of Gaunt (1340 - 1399)
.... + Katherine de Roet (1350 - 1403)
......3 Joan Beaufort (about 1379 - 1440)
...... + Sir Robert de Ferrers (about 1373 - before 1396)
........4 Elizabeth Ferrers (about 1389 - 1434)
........ + Sir John Greystoke (about 1389 - 1436)
..........5 Joan Greystoke ( - after 1470)
.......... + Sir John Darcy (about 1400 - 1458)
............6 Jane Darcy (1430 - )
............ + John Beaumont (1428 - 1461)
..............7 George Beaumont (1452 - 1531)
.............. + Jane Pauncefote
................8 William Beaumont (1478 - 1529)
................ + Mary Basset ( - 1539)
..................9 Cecily Beaumont
.................. + Henry Fenton
....................10 Sir Geoffrey Fenton (1539 - 1608)
.................... + Alice Weston (1541 - )
......................11 Catherine Fenton (1565 - 1630)
...................... + Sir Richard Boyle (1566 - 1643)
........................12 Robert Boyle (1627 - 1691)