| Father | Robert de CLIFFORD III Baron de Clifford (1305 - 1344) |
| Mother | Isabel DE BERKELEY (1307 - 1362) |
| Sibling | Sir Roger de CLIFFORD (1333 - 1389) |
| Sibling | Christina CLIFFORD (1320 - ) |
| Sibling | Robert DE CLIFFORD 4th Baron Clifford (1328 - 1345) |
| Sibling | Isabella DE CLIFFORD (1334 - 1393) |
| Sibling | John DE CLIFFORD (1335 - 1369) |
| Sibling | Sir Lewis DE CLIFFORD (1336 - 1404) |
| Sibling | Thomas DE CLIFFORD (1337 - 1368) |
| Sibling | Margaret DE CLIFFORD (1339 - 1382) |
| Sibling | Hugh de CLIFFORD (1339 - 1402) |
| Sibling | Eleanor DE CLIFFORD (1343 - ) |