Blanche of France, Infanta of Castile French princess (1253–1320) Parents Margaret of Provence Louis IX of France Children Ferdinand de la Cerda, Lord of Lara Alfonso de la Cerda Siblings Philip III of France Peter, Count of Perche and Alençon Robert John Tristan, Count of Valois Blanche de France John of France Isabella of France, Queen of Navarre Louis of France Agnes of France, Duchess of Burgundy Margaret of France, Duchess of Brabant Partners Ferdinand de la Cerda
