| Male John DE COURTENAY |
| Birth | Aft 1194 | Okehampton, Devon, England |
| Death | 3 May 1273 | |
| Burial | ||
| Marriage | ||
| Father | Robert DE COURTENAY | F16390 Group Sheet | |
| Mother | Mary DE VERNON | F16390 Group Sheet | |
| Female Isabell DE VERE |
| Birth | Aft 1203 | Totnes, Devonshire, England |
| Death | Aft Feb 1298 | |
| Burial | ||
| Father | Earl Of Oxford Hugh DE VERE, IV | F16426 Group Sheet | |
| Mother | Hawise DE QUINCY | F16426 Group Sheet | |
| Male Hugh DE COURTENAY |
| Birth | 25 Mar 1248 | Okehampton, Devonshire, England |
| Death | 28 Feb 1290 | Cullicomb, Devonshire, England |
| Burial | Cowick, Devonshire, England |
|
| Spouse | Alianora LE DESPENCER | F7626 | |
| Marriage | ||
| Spouse | Eleanor LE DESPENSER | F16388 | |
| Marriage | Bef 1275 | |