| Name | William De Mandeville | |
| Suffix | [Earl of Essex] | |
| Born | Abt 1175 | Of, Essex, England |
| Gender | Male | |
| AFN | V9VR-GR | |
| Died | 1 Jan 1226 | |
| Buried | Priory, Shouldham, Norfolk, England |
|
| Person ID | I44408 | Smoky Mountain Ancestral Quest |
| Last Modified | 12 Jan 2001 | |
| Father | Geoffrey Fitzpiers, b. Abt 1161, Of, Walden, Essex, England | |
| Mother | Beatrice De Saye, b. Abt 1168, , Kimbolton, Norfolk, England | |
| Married | Bef 18 Jan 1184 | Of, Essex, England |
| Family ID | F9499 | Group Sheet |
| Family | Christine Fitzrobert | |
| Married | Bef 11 Nov 1220 | Of, Essex, England |
| Family ID | F16471 | Group Sheet |