| Male Earl of Devon William DE VERNON |
| Birth | 1155 | |
| Death | Sep 1217 | |
| Burial | ||
| Marriage | ||
| Father | Baldwin DE VERNON | F7904 Group Sheet | |
| Mother | Adelise | F7904 Group Sheet | |
| Female Mary DE VERNON |
| Birth | Abt 1196 | |
| Death | Aft 1242 | |
| Burial | ||
| Spouse | 1st Baron Okehampton Robert DE COURTENAY | F7884 | |
| Marriage | ||
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