Imiza of Luxembourg Countess (1000–1055) Parents Irmentrude van de Wetterau Frederick of Luxembourg Children Itha Gräfin von Kilchberg Welf, Duke of Carinthia Kunigunde of Altdorf Siblings Giselbert of Luxembourg Adalbero III of Luxembourg Frederick, Duke of Lower Lorraine Henry VII, Duke of Bavaria Hermann of Gleiberg Ogive of Luxembourg Gisela von Luxemburg Partners Welf III, Count of Altdorf