| Father | John GAUNT Duke of Lancaster (1340 - 1399) |
| Mother | Catherine DE ROET (1350 - 1403) |
| Sibling | Lady Joan DE BEAUFORT (1379 - 1440) |
| Sibling | John Earl of Somerset BEAUFORT ( - ) |
| Sibling | Henry BEAUFORT (1375 - 1447) |
| Sibling | Thomas BEAUFORT Duke of Exeter (1377 - 1426) |
| Sibling | Joan DE BEAUFORT ( - 1440) |
| Sibling | John DE BEAUFORT (1373 - 1410) |
| Sibling | John Earl of Somerset K G BEAUFORT (1371 - 1410) |
| Sibling | Joan DE BEAUFORT ( - 1440) |
| Sibling | Thomas , Duke of Exeter BEAUFORT ( - 1426) |
| Sibling | Joan DE BEAUFORT ( - 1440) |
| Sibling | Joan FITZ RICHARD (1331 - 1410) |
| Sibling | John UNKNOWN E of Somerset Lineage Edward III (1373 - 1410) |
| Sibling | John BEAUFOR Earl of Somerset (1373 - 1410) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | Joan de BEAUFORT (1375 - 1440) |
| Sibling | Henry BEAUFORT Cardinal of St Eusebius (1375 - 1447) |
| Sibling | John BEAUFORT KG Earl of Somerset (1371 - ) |
| Sibling | Joan de BEAUFORT (1379 - 1440) |
| Sibling | John Fairborn BEAUFORT Marquess Of Somerset (1371 - ) |
| Sibling | John BEAUFORT EARL SOMMERSET (1371 - 1410) |
| Sibling | Thomas BEAUFORT Duke Of Exeter K. G. (1377 - ) |
| Sibling | Henry BEAUFORT CARDINAL (1375 - 1447) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | John BEAUFORT (1372 - ) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | John BEAUFORT ( - 1410) |
| Sibling | Joan DE BEAUFORT (1379 - 1440) |
| Sibling | John Somerset BEAUFORT (1371 - 1410) |
| Sibling | Joan DE BEAUFORT (1379 - 1440) |
| Sibling | John OF SOMERSET BEAUFORT (1373 - 1410) |
| Sibling | 2nd Duke Thomas PLANTAGENET (1377 - 1426) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | John BEAUFORT (1372 - ) |
| Sibling | Thomas_ Beaufort, Duke of EXETER (1377 - 1426) |
| Sibling | Joan de Beaufort (1375 - 1440) |
| Sibling | John Beaufort 1st Earl OF (1371 - 1410) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | John F BEAUFORT (1373 - 1410) |
| Sibling | Joan DE BEAUFORT ( - 1440) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | Thomas BEAUFORT (1377 - 1426) |
| Sibling | John Fairborn BEAUFORT (1371 - 1409) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | John DE BEAUFORT (1370 - 1410) |
| Sibling | Joan DE BEAUFORT ( - 1440) |
| Sibling | John Fairborn BEAUFORT Marquess Of Somerset K G (1371 - ) |
| Sibling | John Marquis DE BEAUFORT (1371 - ) |
| Sibling | Henry BEAUFORT, 3rd Duke of Somerset (1375 - 1447) |
| Sibling | Joan Beaufort Countess of WESTMORELAND (1375 - 1440) |
| Sibling | Thomas de Beaufort PLANTAGENET, Earl of Dorset ( - 1426) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | Joan DE BEAUFORT ( - 1440) |
| Sibling | John BEAUFORT (1371 - ) |
| Sibling | John BEAUFORT KG Earl of Somerset (1371 - ) |
| Sibling | Joan de BEAUFORT (1375 - 1440) |
| Sibling | Henry BEAUFORT Cardinal of St Eusebius (1375 - 1447) |
| Sibling | Cardinal Henry BEAUFORT ( - 1447) |
| Sibling | Thomas BEAUFORT , Duke of Exeter ( - ) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | ** John BEAUFORT BEAUFORT Marquess of Som (1371 - ) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | Thomas BEAUFORT (1377 - 1427) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | John BEAUFORT (1363 - ) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | Henry_ IV ( - ) |
| Sibling | John DUKE OF SOMERSET (1404 - 1444) |
| Sibling | Henry DE BEAUFORT (1375 - 1447) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | John BEAUFORT (1373 - 1410) |
| Sibling | Henry DE BEAUFORT (1376 - 1447) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | Thomas DE BEAUFORT (1377 - 1426) |
| Sibling | Joan DE BEAUFORT (1375 - 1440) |
| Sibling | John BEAUFORT Earl of Somerset (1370 - ) |
| Sibling | Henry BEAUFORT Bishop (1376 - 1447) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | John OF SOMERSET BEAUFORT (1373 - 1410) |
| Sibling | 2nd Duke Thomas PLANTAGENET (1377 - 1426) |
| Sibling | ** John BEAUFORT EARL SOMMERSET (1371 - 1410) |
| Sibling | Thomas BEAUFORT Duke Of Exeter K. G. (1377 - ) |
| Sibling | Henry BEAUFORT CARDINAL (1375 - 1447) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | Joan DE BEAUFORT ( - 1440) |
| Sibling | Thomas BEAUFORT ( - ) |
| Sibling | John BEAUFORT (1371 - 1409) |
| Sibling | John " Fairborn" BEAUFORT MARQUESS OF SOMERSET (1371 - ) |
| Sibling | John BEAUFORT (1371 - 1410) |
| Sibling | John OF GAUNT (1340 - 1399) |
| Sibling | Joan DE BEAUFORT ( - 1440) |
| Sibling | John Earl of Somerset Fairborn de BEAUFORT (1371 - ) |
| Sibling | Thomas BEAUFORT ( - ) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | ** John BEAUFORT SWYNFORD ( - 1410) |
| Sibling | Thomas BEAUFORT Duke of Exeter (1377 - 1426) |
| Sibling | John BEAUFORT Marquis of Somerset (1371 - 1410) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | Thomas DE BEAUFORT (1377 - ) |
| Sibling | Henry DE BEAUFORT Cardinal (1375 - 1447) |
| Sibling | John DE BEAUFORT Earl (1371 - 1410) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | John BEAUFORT (1372 - 1410) |
| Sibling | John DE BEAUFORT (1370 - 1410) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | John BEAUFORT (1363 - ) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | Thomas BEAUFORT Duke Of Exeter K. G. (1377 - ) |
| Sibling | Henry BEAUFORT CARDINAL (1375 - 1447) |
| Sibling | John BEAUFORT EARL SOMMERSET (1371 - 1410) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | Henry BEAUFORT (1375 - 1447) |
| Sibling | Thomas BEAUFORT ( - 1426) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | John BEAUFORT Earl of Somerset (1371 - ) |
| Sibling | Joan DE BEAUFORT ( - 1440) |
| Sibling | Thomas BEAUFORT (1377 - 1426) |
| Sibling | Joan DE BEAUFORT ( - ) |
| Sibling | John BEAUFORT (1371 - ) |
| Sibling | Henry DE BEAUFORT (1376 - 1447) |
| Sibling | Blanche PLANTAGENET (1359 - 1388) |