Sibyl married William de Ferrers, 5th Earl of Derby III before 14 May 1219. William (son of 4th Earl of Derby William II de Ferrers and Agnes de Meschines) was born in 1193 in Derby, Derbyshire, England; died before 28 Mar 1254 in Evington, Leicestershire, England; was buried on 31 Mar 1254 in Merevale Abbey. Merevale, Warwickshire, England. [Group Sheet] [Family Chart]
Family/Spouse: Roger de Quincy, 2nd Earl of Winchester. Roger (son of Saer de Quincy, 1st Earl of Winchester IV and Margaret de Beaumont) was born about 1195 in Winchester, Hamptonshire, England; died on 25 Apr 1264 in Buckley, Northamptonshire, England; was buried in Brackley, Northamptonshire, England. [Group Sheet] [Family Chart]
Abt 1191 - Bef 1238 (< 46 years)
