William V of Horne lord of Horne and Altena (1324-1358) (1324–1358) Parents William IV of Horne Elizabeth of Cleves-Hülchrath Children William VI of Horne Siblings Joanna of Horne Gerard II of Horne Dirk Loef of Horne Arnold II of Horne Oda of Horne Elizabeth of Horne Elisabeth van Horne (1326-1360) Elisabeth van Hoorne Jolanda von Jülich-Bergheim Partners Mechteld van Arkel