William FERRERS, EARL OF DERBY
He married Margaret de Quincy 1238 . Margaret de Quincy was born at of Winchester, Hampshire, England Abt 1218 daughter of Roger de Quincy, Earl of Winchester and Helen (Elena) of Galloway, Countess of Worcester .
They were the parents of 4
children:
Robert Ferrers, Earl of Derby
born 1239.
William de Ferrers, Knight
born Abt 1240.
Agnes de Ferrers
born 1244.
Joan de Ferrers, Baroness Berkeley
born Abt 1248.
William Ferrers, Earl of Derby died 24 Mar 1254 at Evington, Leicestershire, England .
Margaret de Quincy died Bef 12 Mar 1284 .