Otto IV, Count of Wittelsbach

Otto V, Count of Wittelsbach also called Otto IV, Count of Scheyern was a son of Otto III, Count of Scheyern and Wittelsbach and grandson of Eckhard I, Count of Scheyern. Otto named himself Otto of Wittelsbach, after Wittelsbach Castle near Aichach. He was made Count of Wittelsbach in 1115 by his father. From 1116 onward, he served Henry V, Holy Roman Emperor and he was made Count palatine of Bavaria.

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Source: Wikipedia