| Father | Sir Knight Otho GILBERT, SHERIFF OF DEVONSHIRE (1418 - 1493) |
| Mother | Alicia MULES (1423 - 1466) |
| Sibling | Isabella GILBERT (1456 - 1494) |
| Sibling | Otis GILBERT (1440 - 1494) |
| Sibling | Alice GILBERT (1442 - ) |
| Sibling | Edward GILBERT (1443 - ) |
| Sibling | Jane GILBERT (1445 - ) |
| Sibling | Sir Otho GILBERT II (1446 - 1494) |
| Sibling | Lady Elizabeth GILBERT (1450 - 1451) |
| Sibling | John GILBERT (1450 - 1494) |
| Sibling | John Robert GILBERT (1462 - 1546) |
| Sibling | Sir Thomas GYLBERT/GILBERT (1490 - 1529) |
| Sibling | Richard GILBERT ( - 1524) |
| Sibling | Geffry ( - 1551) |