Robert de Ferrers, 2nd Earl of Derby, was born on an unknown date to Robert de Ferrers, 1st Earl of Derby (c1062-1139) and Hawise de Vitré (c1069-) and died 1162 of unspecified causes. He married Margaret Peverel (c1144-) .
Children
| Name | Birth | Death | Joined with |
| William de Ferrers, 3rd Earl of Derby (-1190) | 21 October 1190 | Sibylla de Braose (-1227) | |
| Walkelin de Ferrers (c1135-1190) | |||
| Maud de Ferrers (c1142-aft1175) | 1142 | 1175 | Bertram III de Verdun (c1134-1192) |
Footnotes (including sources)
| ‡ General |