| Father | Edmund De MORTIMER [LORD OF WIGMORE (1304 - ) |
| Mother | Margaret De FIENNES (1262 - 1333) |
| Sibling | Isolde (Iseude, Iswolde) MORTIMER [BARONESS AUDLEY (1265 - 1336) |
| Sibling | Maud De MORTIMER (1286 - 1312) |
| Sibling | Roger MORTIMER [EARL OF MARCH] (1287 - 1330) |
| Sibling | Hugh De MORTIMER (1290 - ) |
| Sibling | Joan De MORTIMER (1292 - ) |
| Sibling | Margaret MORTIMER (1296 - ) |
| Sibling | Edmund De MORTIMER (1298 - ) |
| Sibling | Matilda MORTIMER (1298 - ) |
| Sibling | John De MORTIMER (1300 - 1318) |
| Sibling | Elizabeth MORTIMER (1302 - ) |
| Sibling | Isolde MORTIMER ( - ) |
| Sibling | Walter MORTIMER ( - ) |