Arthur II, Duke of Brittany Duke of Brittany from 1305 to 1312 (1261–1312) Parents Beatrice of England John II, Duke of Brittany Children Guy of Penthièvre Alice of Brittany Jeanne de Dreux-Bretagne, Dame de Nogent-le-Rotrou Marie de Montfort Pierre de Bretagne Blanche de Montfort John IV, Duke of Brittany John III, Duke of Brittany Beatrice of Brittany Siblings Eleanor of Brittany Marie of Brittany, Countess of Saint-Pol John of Brittany, Earl of Richmond Blanche of Brittany Henry de Dreux Pierre de Dreux, Comte de Léon Partners Yolande of Dreux Marie, Viscountess of Limoges
