Mechtild von Kleve (1200-1255) (1200–1255) Parents Arnold II, Count of Cleves Adelaide of Heinsberg Dirk I van Valkenburg Isabelle van Limburg Children Henrik van Heusden John II of Heusden Arnold van der Sluijs Siblings Engelbert II of Valkenburg Agnes of Cleves Dirk II van Valkenburg Heinrich von Falkenburg Partners Arent II van Heusden