| Father | Sir Henry DE PERCY (1394 - 1455) |
| Mother | Eleanor de NEVILLE (1398 - ) |
| Sibling | Ralph (Sir) Governor of Bamburgh Castle DE PERCY (1425 - 1464) |
| Sibling | Elizabeth PERCY (1425 - ) |
| Sibling | Thomas PERCY (1422 - 1460) |
| Sibling | John PERCY (1425 - ) |
| Sibling | Male PERCY (1427 - ) |
| Sibling | PERCY (1417 - ) |
| Sibling | Henry PERCY (1416 - 1421) |
| Sibling | Joan PERCY (1415 - 1482) |
| Sibling | John PERCY (1418 - 1420) |
| Sibling | George PERCY (1430 - ) |
| Sibling | Richard PERCY (1434 - 1461) |
| Sibling | William PERCY (1428 - 1462) |
| Sibling | Henry PERCY (1421 - 1461) |
| Sibling | George PERCY (1424 - 1474) |
| Sibling | Lady Eleanor PERCY (1415 - 1452) |
| Sibling | Lady Katherine PERCY (1423 - 1493) |
| Sibling | Anne PERCY (1436 - 1522) |