William IV of Horne Belgian-Dutch noble (1302-1343) (1302–1343) Parents Joanna of Gaesbeek Gerard I of Horne Children Gerard II of Horne Joanna of Horne Arnold II of Horne Oda of Horne Dirk Loef of Horne William V of Horne Elizabeth of Horne Elisabeth van Hoorne Elisabeth van Horne (1326-1360) Siblings Dietrich of Horne Partners Oda Persijn of Putten Elizabeth of Cleves-Hülchrath