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Male William de Ferrers Earl of Derby Click to view William de Ferrers Earl of Derby in the family tree

William de Ferrers was born about 1136 in Oakham, Rutlandshire, England.1   William de Ferrers' father was Robert (William) de Ferrers Earl of Derby and his mother was Margaret Peverel.  His paternal grandparents were Robert de Ferrers Earl of Derby and Hawise de Vitre; his maternal grandparents were William Peverel the Younger Lord Nottingham and Avice de Lancaster.  He was an only child.  He died before October 21st, 1190 in Siege of Acre, Palestine.1 

Family Details of William de Ferrers' family with Sibyl de Braose

1 large-G675.FTW
Further sources/citations:
Complete Peerage, Burke's Genealogical History of the Dormant, Abeyant, Forfeited & Extinct Peerages of the British Empire, Ahnentafel for Margery Arundell, Some Early English Pedigrees @ p 68, large-G675.FTW, large-G675.FTW, 11615-2.ftw, Ahnentafel for Margery Arundell

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