William Ferrers, Earl of Derby
was born at of Derbyshire, England Abt 1200.
His parents were William de Ferrers, Earl of Derby and Agnes de Meschines.
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 5
Robert Ferrers, Earl of Derby
William de Ferrers, Knight
born Abt 1240.
Agnes de Ferrers
born Abt 1246.
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 .