The Ferrers family were a noble Anglo-Norman family that crossed to England with the Norman Conquest and gave rise to a line that would hold the Earldom of Derby for six generations before losing it in rebellion. They also gave rise to several lines that held English peerages, the longest-living going extinct in the male line in the 15th century, as well as a Norman branch of the family that persisted into the 13th century. A French line persisted into the 16th century.