| Father | Sir Thomas DE HARCOURT (1342 - 1417) |
| Mother | Maud GREY (1345 - 1392) |
| Sibling | Sir Thomas HARCOURT (1377 - 1420) |
| Sibling | Catherine HARCOURT (1362 - 1390) |
| Sibling | Anne DE HARCOURT (1371 - 1385) |
| Sibling | Lionel HARCOURT (1373 - ) |
| Sibling | John DE HARCOURT (1375 - 1406) |
| Sibling | Matilda Maud DEHARCOURT (1378 - ) |
| Sibling | Richard DE HARCOURT (1379 - 1431) |
| Sibling | Jane HARCOURT (1381 - 1412) |
| Sibling | Robert HARCOURT (1381 - ) |
| Sibling | Isabel DE HARCOURT (1385 - 1416) |
| Sibling | Jane DE HARCOURT ( - ) |
| Sibling | John DE HARCOURT ( - ) |
| Sibling | Richard DE HARCOURT ( - ) |