Hedwig of Wittelsbach Margravine of Istria by marriage (d. 1174) Parents Heilika of Pettendorf-Lengenfeld Otto IV, Count of Wittelsbach Children Matilda of Andechs Sophie, Gräfin von Andechs Berthold IV, Duke of Merania Kunigunde, Gräfin von Andechs Siblings Conrad of Wittelsbach Friedrich II of Wittelsbach Otto I Wittelsbach, Duke of Bavaria Otto VII, Count Palatine of Bavaria Adelheid von Wittelsbach Partners Berthold I of Istria