| Father | Male John De Courtenay |
| Born | Abt 1217 | Okehampton, Devonshire, England |
| Died | 26 Apr 1274 | |
| Buried | Ford Abbey, Devonshire, England |
|
| Married | ||
| Father | Robert De Courtenay, [Sir Knight] | F16387 Group Sheet | |
| Mother | Mary De Reviers | F16387 Group Sheet | |
| Mother | Female Isabel De Vere |
| Born | Abt 1221 | Of Totnes, Devonshire, England |
| Died | Aft Jan 1298 | |
| Buried | Church Of Black, Exeter |
|
| Other Spouse | Oliver Dinham, [Sir] | F7009 | |
| Married | Bef 17 Jan 1276 | |
| Father | Hugh De Vere, [Earl of Oxford] | F7008 Group Sheet | |
| Mother | Hawise De Quincy, Countess | F7008 Group Sheet | |
| Child 1 | Male + Hugh De Courtenay, [Sir Knight] |
| Born | 18 Mar 1248/1250 | , Okehampton, Devonshire, England |
| Died | 21 Feb 1291 | , Cullicomb, Devonshire, England |
| Buried | , Cowick, Devonshire, England |
|
| Spouse | Eleanor Le Despencer | F16366 | |
| Married | Abt 1290 | Of, Devonshire, England |