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 | Robert de Ferrers, I (1062-1139)
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| 2nd Earl of Derby Robert de Ferrers, II (1100-1162)
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 | Margaret Peverel (1100- ) |
| 3rd Earl of Derby Sir William de Ferrers, I (1140-1190)  |
We make every effort to document our research. There is a lot of information that I do not have, and I know there are mistakes in this tree. My feelings will not be hurt if you give me corrections or additional information, especially if you can provide sources for the information.
