2502. William de Ferrers Earl of Derby. Born ca 1130/1135 in Derbyshire. William died bef 21 Oct 1190 in Acre, Palestine.
William, died at the Siege of Acre.
William married Sibyl de Braose (3141) , daughter of William II de Braose (ca 1100-1192) & Bertha fitz Walter (2682) (ca 1120-). Born ca 1135/1140 in Bramber, Sussex. Sibyl died aft 5 Feb 1227/8.