John of France son of Louis IX of France (1247–1248) Parents Margaret of Provence Louis IX of France Children Siblings Philip III of France Peter, Count of Perche and Alençon Robert John Tristan, Count of Valois 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