Family: William de Ferrers, Earl of Derby (F2909)
Robert de Ferrers, Earl of Derby (1100-1159) 
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Margaret Peveril, Countess of Derby (1114- )
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| Malcheline de Ferrers (1138- ) |
| Isolda de Ferrers (1141- ) |
| Matilda de Ferrers (1142- ) |
| Robert de Ferrers (1144- ) |
| Hugo de Ferrers (1146- ) |
| Henry de Ferrers (1148- ) |
| William de Ferrers, Earl of Derby (1136-1190)
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Elizabeth de Ferrers (1166- )  |
| Millicent de Ferrers (1177- ) |