Otto, Margrave of the Nordmark

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Otto (died 26 June 1057) was illegitimate son of Bernard, Margrave of the Nordmark, and a Slav mistress whose name is unknown. He took the title march and claimed the Northern March following the death in battle of his half-brother William on 10 September 1056. He was opposed, however, by Lothair Udo I and killed in battle near Hausneindorf the next summer.