| Male William de Vernon, Earl of Devon |
| Birth | 1155 | |
| Death | 10 Sep 1217 | |
| Burial | Christchurch Priory, Twynham (now Christchurch), Dorsetshire, England |
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| Marriage | ||
| Father | Baldwin de Reviers, Earl of Devon | F5534 Group Sheet | |
| Mother | Adeliza de Baalum | F5534 Group Sheet | |
| Female Mabel de Beaumont |
| Birth | ||
| Death | ||
| Burial | ||
| Father | Sir Robert II, Count de Meulan and d' Elbeuf | F2895 Group Sheet | |
| Mother | Maud de Dunstanville | F2895 Group Sheet | |
| Female + Mary de Vernon |
| Birth | ||
| Death | ||
| Burial | ||
| Spouse | Peter de Prouz | F5532 | |
| Marriage | 1200 [2, 3] | |
| Spouse | Sir Robert de Courtenay, Baron of Oakhampton | F5531 | |
| Marriage | 1213 | England |
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Sources 🟢 Primary Evidence 🟡 Secondary Evidence 🟠Tertiary Evidence 🔴 Unreliable Evidence |
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