.. 1 King Henry IV of England (1366 - 1413) .. + Mary de Bohun (1370 - 1394) .... 2 Sir Humphrey Plantagenet (1390 - 1447) .... + N.N. ...... 3 Antigone of Gloucester (1428 - ) ...... + Sir Henry Grey (1418 - 1450) ........ 4 Sir Richard Grey (1436 - 1466) ........ + Margaret Tuchet .......... 5 Elizabeth Grey .......... + Sir John Ludlow ( - 1493) ............ 6 Alice Ludlow (1483 - ) ............ + Humphrey Vernon ( - 1542) .............. 7 George Vernon .............. + Elizabeth Pigot ................ 8 John Vernon ................ + Elizabeth Devereux .................. 9 Elizabeth Vernon .................. + Sir Henry Wriothesley ( - 1624) .................... 10 Sir Thomas Wriothesley ( - 1667) .................... + Rachel de Massu ...................... 11 Frances Wriothesley ( - 1723) ...................... + Sir William Russell (1639 - 1683) ........................ 12 Rachel Russell ( - 1725) ........................ + Sir William Cavendish (1672 - 1729) .......................... 13 Sir William Cavendish (1698 - 1755) .......................... + Catherine Hoskins ( - 1777) ............................ 14 Sir William Cavendish (1720 - 1764) ............................ + Charlotte Elizabeth Boyle (1731 - 1754)