| Father | Hugh De COURTENAY [EARL OF DEVON] ( - ) |
| Mother | Margaret De BOHUN (1311 - ) |
| Sibling | Philip COURTENAY [Sir KNIGHT] (1340 - 1406) |
| Sibling | Elizabeth COURTENAY (1333 - 1395) |
| Sibling | Eleanor COURTENAY (1344 - ) |
| Sibling | Guenora COURTENAY (1348 - ) |
| Sibling | Isabel COURTENAY (1353 - ) |
| Sibling | Margaret COURTENAY [BARONESS COBHAM (1326 - 1385) |
| Sibling | Hugh COURTENAY ( - ) |
| Sibling | Edward COURTENAY (1329 - 1372) |
| Sibling | Thomas COURTENAY [SIR KNIGHT] (1331 - 1381) |
| Sibling | Catherine COURTENAY (1335 - 1399) |
| Sibling | Joan COURTENAY (1337 - ) |
| Sibling | Matilda COURTENAY (1339 - ) |
| Sibling | William COURTENAY [ARCHBISHOP] (1342 - 1396) |
| Sibling | John COURTENAY (1346 - ) |
| Sibling | Peter COURTENAY [SIR KNIGHT] (1349 - 1404) |
| Sibling | Anne COURTENAY (1351 - ) |
| Sibling | Philippa De COURTENAY (1357 - ) |