Margaret, Marchioness of Namur Luxembourg noble (1194-1270) (1194–1270) Parents Yolanda of Flanders Peter II of Courtenay Children Philip I of Vianden Friedrich von Vianden Yolanda of Vianden Matilda of of Požega Henry I van Vianden Siblings Baldwin II of Constantinople Elisabeth of Courtenay Inés de Courtenay Mathilde von Courtenay Henry II of Namur Yolanda de Courtenay Robert of Courtenay Philip II, Marquis of Namur Marie de Courtenay Eleonor of Courtenay Partners Raoul of Issoudun Henry I, Count of Vianden