| | Edmund Beaufort 2nd Duke of Somerset, KG 1406–1455 | | | | John Beaufort 1st Earl of Somerset, KG 1373–1410 Margaret Holland 1381–1439 | | | | John Plantagenet of Gaunt (Ghent), 1st Duke of Lancaster, KG 1340–1399 Blanche Plantagenet of Lancaster 1341–1369 Constanza … Queen of Castile 1354–1394 Katherine de Roet (Rouet) 1350–1403 | | | | King of England and France, Lord of Ireland (1327-1377) Edward III Plantagenet 1312–1377 Philippe (d'Avesnes) de Hainault 1314–1369 | | |
| | | Henry Plantagenet of Grosmont, 1st Duke of Lancaster, 4th Earl of Leicester and Lancaster, KG 1310–1361 | | |
| | | King of Castile and Leon (1350-1369) Peter (Pedro) … 1334–1369 | | |
| | | Payne de Roet (Rouet) …–… |
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| | | Thomas Holland 2nd Earl of Kent …–… | | | | Thomas Holland 1st Earl of Kent, KG …–1360 Joan Plantagenet Fair Maid of Kent 1328–1385 | | |
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