| Sir Thomas Willoughby ( - <1439) |
Lionel Welles Lord Welles (ca1406 - 1461) |
| Joan Arundel (ca1410 - ) |
Joan de Waterton ( - 1434) |
| Sir Robert Willoughby | Cecily Welles |
| b. d. 30 May 1465 . |
b. d. 1480 . Eventual co-heir in her issue. |
| Robert Willoughby Sir Christopher Willoughby Lord Willoughby of Eresby |