Otto IV, Count of Wittelsbach

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Otto IV, Count of Wittelsbach (c. 1083-4 August 1156) was a descendant of Count Otto II of Scheyern and Richgard of Weimar-Istrien. Otto entitled himself after Wittelsbach Castle near Aichach from 1116 onwards, served Henry V, Holy Roman Emperor and was Count palatine of Bavaria since 1120.

Otto's sons with Heilika of Lengenfeld-Pettendorf were Otto I, the first Wittelsbach duke of Bavaria and Conrad of Wittelsbach, archbishop of Mainz and Salzburg.