| John of Gaunt | f 1340 | d 1399 | |
| & Marie de Saint-Hilaire | f 1340 | d >1399 | |
| Blanche Plantagenet | f 1359 | d ~1388 | |
| & Blanche of Lancaster | f 1345 | d 1368 | |
| Philippa of Lancaster | >> | f 1360 | d 1415 |
| John of Lancaster | f 1362 | d ~1365 | |
| Elizabeth of Lancaster | f 1364 | d 1426 | |
| Edward of Lancaster | f 1365 | d ~1365 | |
| John of Lancaster | f 1366 | d ~1367 | |
| Henry IV of England | >> | f 1367 | d 1413 |
| Isabel of Lancaster | f 1368 | d 1368 | |
| & Constanza de Castilla | f 1354 | d 1394 | |
| Catherine of Lancaster | >> | f 1373 | d 1418 |
| John of Lancaster | f 1374 | d 1375 | |
| & Katherine Swynford (de Ruet) | f 1350 | d 1403 | |
| John Beaufort | >> | f 1373 | d 1410 |
| Henry Beaufort | f ~1374 | d 1447 | |
| Thomas Beaufort | f ~1377 | d 1426 | |
| Joan Beaufort | >> | f ~1379 | d 1440 |
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