| | 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 | | |
| | Robert de Courtenay 1170–1242 | | | | William (de Vernon) Redvers 1128–1217 Mabel (Mabirie) de Beaumont 1170–1204 |
| | | Reginald Seigneur de Courtenay 1125–1194 Hawise D'Aubrinces 1135–1209 | | | | | | | | Josceline de Courtenay …–1065 | | | | Athon of Courtenai … …–1000 |
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