Engelbert III, Margrave of Istria Austrian noble (d. 1173) Parents Uta of Passau Engelbert, Duke of Carinthia Children Pellegrino II of Aquileia Siblings Hartwig II, Bishop of Regensburg Ulrich I of Carinthia Rapoto I, Count of Ortenburg Matilda of Carinthia Henri de Carinthie Ida of Carinthia Partners Matilda of Sulzbach