| b 1281, Of, Okehampton, Devonshire, England | Renaud 'Reginald' Seigneur Courtenay | > | d 27 Apr 1327, | Robert De Courtenay, [Sir Knight] | Hawise De Curcy | > |
| John De Courtenay | b 1170 | William Reviers, [Earl of Devon] | > | |
| | b 1218 | Mary De Reviers | Mabel De Beaumont, [Countess] | > | |
| Hugh De Courtenay, [Sir Knight] | d 03 May 1274 | b 1196 | Robert De Vere | > |
| |b 25 Mar 1248 | | | Hugh De Vere, [Earl of Oxford] | Isabel Bolebec | > |
| |d 28 Feb 1291 | Isabel De Vere | b 1184 | Saher IV De Quincy, Earl | > |
| | | b 1222 | Hawise De Quincy, Countess | Margaret De Beaumont | > |
| Avelina 'Ada' De Courtenay, [Baroness] | d AFT FEB 1298 1299 | b 1178 | Thurston Le Despencer | > |
| |John Giffard | Thomas Despencer | Mrs-Thurston Le Despencer | |m 06 Nov 1311 | Hugh Le Despencer | b 1169 |
| |Of, Okehampton, Devonshire, England | |b 1197 | Mrs-Thomas Despencer | ||
| Eleanor Le Despencer | d 23 Feb 1238 | b 1172 | ||
| b 1240 | | | |||
| d 30 Sep 1328 | Mrs-Hugh Le Despencer | |||