| Male Sir William FitzRoy, Count of Boulogne and Mortain |
| Birth | Abt 1135 | |
| Death | Oct 1159 | France |
| Burial | Montmorillon, Nouvelle-Aquitaine, France |
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| Marriage | ||
| Father | Stephen of Blois, King of England | F2446 Group Sheet | |
| Mother | Matilda, Countess of Boulogne | F2446 Group Sheet | |
| Female Isabel de Warenne, Countess of Surrey |
| Birth | 1137 | Surrey, England |
| Death | 12 Jul 1203 | |
| Burial | Lewes Priory, Lewes, Sussex, England![]() Lewes Priory, Lewes, Sussex, England |
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| Other Spouse | Hamelin Plantagenet, Earl of Surrey | F3027 | |
| Marriage | Apr 1164 [1] | England [1] |
| Father | William de Warenne, Earl of Surrey | F5245 Group Sheet | |
| Mother | Ela de Talvas | F5245 Group Sheet | |
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Sources 🟢 Primary Evidence 🟡 Secondary Evidence 🟠Tertiary Evidence 🔴 Unreliable Evidence |
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