 The first person to swear fealty to Matilda was Stephen of Blois who was the son of Adela of Normandy, the daughter of William the Conqueror.Henry arranged for Matilda to marry the much younger Geoffrey Plantagenet, Count of Anjou, and though the marriage was stormy, it finally produced a son, Henry Plantagenet.When King Henry died in the Duchy of Normandy he reiterated that Empress Matilda was his heir.