| Father | John Sheriff of Kent De St. Leger (1404 - 1442) |
| Mother | Margery Saint Leger De Donnet (1444 - ) |
| Sibling | Sir Thomas St Leger (1442 - 1483) |
| Sibling | Anne De Saint Leger (1426 - 1442) |
| Sibling | Thomas Saint Leger (1320 - 1350) |
| Sibling | Florence St. Leger (1435 - 1500) |
| Sibling | John Saint Leger ( - ) |
| Sibling | Bartholomew St. Leger (1442 - ) |
| Sibling | Margaret Saint Leger (1428 - 1495) |
| Sibling | Bartholomew Saint Leger (1442 - 1516) |
| Sibling | Alice Saint Leger (1441 - ) |
| Sibling | Anne De St Leger (1426 - 1442) |
| Sibling | Ralph St. Leger ( - ) |
| Sibling | Sir James St Leger (1441 - 1501) |
| Sibling | Philippa De St. Leger (1430 - 1459) |
| Sibling | Alice St. Leger (1440 - ) |
| Sibling | Margaret De St Leger (1437 - 1496) |