Margaretha von Sponheim-Vianden (1255-1316) (1255–1316) Parents Marie van Perweis, Heiress of Perweis, Grimbergen et Ninove Philip I of Vianden Children Maria van Loon en Chiny Mechtild van Loon en Chiny Siblings Philipp von Vianden Godfrey I of Vianden Partners Arnold V, Count of Loon