Family: 1st Duke of Lancaster John of Gaunt Plantagenet / Katherine Swynford Roet (F739)
m. 13 Jan 1396
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Philippa d'Avesnes (1311-1369)
|
Duke of Aquitaine Edward Plantagenet (1330-1376)  |
| Isabella Plantagenet (1332-1379) |
| Joan Plantagenet (1335-1348) |
| William Plantagenet (1336-1337) |
| 1st Duke of York Edmund Langley Plantagenet (1341-1402) |
| Mary Plantagenet (1346-1361) |
| 1st Duke of Lancaster John of Gaunt Plantagenet (1340-1399)
|
| Katherine Swynford Roet (1350-1403)
|
 | 1st Earl of Somerset John Beaufort (1373-1410) |
 | Lady Joan Beaufort (1375-1440) |