| | Catherine de Courtenay …–… | | | | Hugh de Courtenay 2nd Earl of Devon 1303–1377 Margaret de Bohun 1311–1391 | | | | Hugh de Courtenay 1273–1340 | | | | Eleanor le Despenser 1240–1328 | | | | John de Courtenay 1218–1274 | | |
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| | | Humphrey de Bohun Earl of Essex & 4th Earl of Hertford 1275–1321 Elizabeth Plantagenet …–1316 | | | | Edward I Plantagenet 1239–1307 Queen consort of England (1272-1290) Eleanor … of Castile 1241–1290 Queen of England Margaret … of France 1279–1318 | | | | King of England, Lord of Ireland and Duke of Aquitaine (1216-1272) Henry III Plantagenet of Winchester 1207–1272 Queen Consort of England (1236-1272) Eleanor … of Provence 1217–1291 | | |
| | | King of Castile (1217-1252) and Leon (1230-1252), Saint Ferdinand III … 1199–1252 Jeanne (Joan) de Dammartin Countess of Ponthieu 1220–1279 | | |
| | | King of France (1270-1285) Philip III … 1245–1285 | | |
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