Richard OF CORNWALL , 1st Earl of Cornwall

Richard married Isabel MARSHAL ,Countess of Hertford; Countess of Cornwall, daughter of William MARSHAL , 1st Earl of Pembroke and Isabella DE CLARE Countess of Pembroke, on 30 Mar 1231 in Fawley, Buckinghamshire, England. (Isabel MARSHAL ,Countess of Hertford; Countess of Cornwall was born on 9 Oct 1200 in Pembroke Castle, Pembroke, Wales and died on 17 Jan 1240 in Berkhamsted Castle, Hertfordshire, England.)