William de Ferrers, 4th Earl of Derby

William II de Ferrers, 4th Earl of Derby (c. 1168 – c. 1247), was a favourite of King John of England. He succeeded to the estate (but not the title) upon the death of his father, William de Ferrers, 3rd Earl of Derby, at the Siege of Acre in 1190.[1] He was head of a family which controlled a large part of Derbyshire which included an area known as Duffield Frith.

  1. ^ One or more of the preceding sentences incorporates text from a publication now in the public domainChisholm, Hugh, ed. (1911). "Ferrers". Encyclopædia Britannica. Vol. 10 (11th ed.). Cambridge University Press. p. 286.

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