Peter, Count of Perche and Alençon French count (1251–1284) Parents Margaret of Provence Louis IX of France Children Siblings Philip III of France Agnes of France, Duchess of Burgundy Margaret of France, Duchess of Brabant Blanche of France, Infanta of Castile Louis of France Isabella of France, Queen of Navarre Blanche de France John of France John Tristan, Count of Valois Robert Partners Joan, Countess of Blois
