William IV, Prince of Orange hereditary stadtholder of the Netherlands (1711-1751) (1711–1751) Parents Marie Louise of Hesse-Kassel John William Friso, Prince of Orange Children unnamed daughter van Oranje-Nassau Anna van Oranje-Nassau unnamed son van Oranje-Nassau William V, Prince of Orange unnamed daughter2 van Oranje-Nassau Caroline of Orange-Nassau Siblings Princess Amalia of Nassau-Dietz Partners Anne, Princess Royal and Princess of Orange
