John of England
While John was immediately declared ruler of England and Normandy, the people Anjou, Maine, and Brittany refused to declare John as their ruler and instead, declared Arthur of Brittany, who was the son of one of John's older brother, Geoffrey, their ruler. Arthur fought his uncle for the throne, with the support of Philip II of France. The conflict between Arthur and John had serious consequences for both. Finally, Philip recognised John over Arthur. The price paid was John's agreement to be Philip's vassal in Normandy and Angevin.