The Duke of Alençon was a title held by members of the French nobility, particularly associated with the region of Alençon in Normandy. The title became prominent during the late Middle Ages and was often linked to the Valois dynasty. The dukes played significant roles in the political and military affairs of France, especially during the Hundred Years' War. One notable Duke of Alençon was Charles, Duke of Alençon, who lived in the 15th century. He was a key supporter of Joan of Arc and fought against the English forces. His contributions to the French military efforts helped to reclaim territories during a tumultuous period in French history.