William [Earl of Derby] FERRERS
He married Margaret de Quincy 1238 . Margaret de Quincy was born at of Winchester, Hampshire, England Abt 1218 .
They were the parents of 5
children:
Robert [Earl of Derby] Ferrers
born 1239.
William de [Sir Knight] Ferrers
born Abt 1240.
Agnes de Ferrers
born 1244.
Elizabeth Ferrers
born Abt 1246.
Joan de Ferrers
born Abt 1248.
William [Earl of Derby] Ferrers died 24 Mar 1254 at Evington, Leicestershire, England .
Margaret de Quincy died Bef 12 Mar 1284 .