Tompsett: and Lord Segrave, Earl of Nottingham, Lord Mowbray 6th. The two daughters eventually became the two co-heirs of the Dukedom of
Norfolk. The Complete Peerage conflicts with itself on which was the elder daughter. Under Ferrers Vol.V, p357 it says that Isabel was the eldest, but under Norfolk Vol.IX,p.610 note c it says that Margaret was probably older as her son inherited the title. Knight of the Garter. Lord Mowbray, Seagrave, and Stourtan. Created Lord Nottingham 1383. Lord Marshall of England 1384. Duke of Norfolk.