| Male William de Ferrers, Earl of Derby |
| Birth | ||
| Death | 1190 | Acre, Holy Land |
| Burial | ||
| Marriage | Abt 1162 | |
| Other Spouse | Sibyl de Braose | F2987 | |
| Marriage | Abt 1173 | |
| Father | Robert de Ferrers, Earl of Derby | F2989 Group Sheet | |
| Mother | Margaret Peverel | F2989 Group Sheet | |
| Female + Isabel de Ferrers |
| Birth | ||
| Death | Abt 1282 | |
| Burial | ||
| Spouse | Roger de Mortimer | F5327 | |
| Marriage | Abt 1190 | England |
| Spouse | Piers FitzHerbert | F8801 | |
| Marriage | ||
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