John III, Marquis of Namur Marquis of Namur (d. 1429) Parents William I, Marquis of Namur Caterina di Savoia-Vaud Children Philippe I de Namur, Seigneur de Dhuy Siblings William II, Marquis of Namur Marie de Namur Jean du Bois, Siegneur de la Maison Fort Partners Johanna van Abcoude