| Father | Hugh De COURTENAY [Sir KNIGHT] (1248 - ) |
| Mother | Eleanor Le DESPENCER (1252 - 1328) |
| Sibling | John De COURTENAY (1263 - ) |
| Sibling | Robert De COURTENAY (1265 - ) |
| Sibling | Alice De COURTENAY (1267 - ) |
| Sibling | Margaret De COURTENAY (1269 - ) |
| Sibling | Aveline De COURTENAY (1271 - ) |
| Sibling | Egelina De COURTENAY (1273 - ) |
| Sibling | Thomas De COURTENAY (1281 - ) |
| Sibling | Isabell De COURTENAY (1283 - 1325) |
| Sibling | Thomas De COURTENAY (1278 - ) |
| Sibling | John De COURTENAY (1283 - ) |
| Sibling | Robert De COURTENAY (1285 - ) |
| Sibling | Alice De COURTENAY (1289 - ) |
| Sibling | Eleanor De COURTENAY [Baroness Grey] (1260 - ) |
| Sibling | Hugh De COURTENAY ( - 1340) |
| Sibling | Philip De COURTENAY (1277 - 1314) |
| Sibling | Margaret De COURTENAY (1279 - 1348) |
| Sibling | Avelina (Ada) De COURTENAY [BARONESS GIFFAR (1281 - 1327) |