| Entry Type | Person |
| Surname | de Ferrers |
| Forenames | Robert |
| Pre Title | Lord |
| Title | 6th Earl of Derby |
| Epithet | Derbyshire landowner (Duffield Frith); fought against Henry III in the Second Barons' War, and was captured in the Battle of Chesterfield, 1216. |
| Dates | c 1239-1279 |
| Authorised Form of Name | de Ferrers; Lord; Robert (c 1239-1279); 6th Earl of Derby; Derbyshire landowner (Duffield Frith); fought against Henry III in the Second Barons' War, and was captured in the Battle of Chesterfield, 1216. |
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