Otto I, Count of Scheyern-Dachau-Valley

Otto I, Count of Scheyern-Dachau-Valley
Born	probably: Dachau
Died	after 5 November 1130 probably: Valley
Noble family	House of Wittelsbach
Spouse(s)	Adelaide of Weilheim
Father	Arnold I, Count of Scheyern
Mother	Beatrix of Reipersberg

Otto I, Count of Scheyern-Dachau-Valley (also known as Otto of Dachau-Valley; d. after 5 November 1130) was a German nobleman. He was a son of Count Arnold I of Scheyern and his wife, Beatrix of Reipersberg. Otto I was the founder of the Scheyern-Dachau-Valley line.

He acquired the town of Grub via his wife. In 1122, he founded the town of Bernried am Starnberger See and became its vogt. In 1124, he acquired Dachau and the County of Valley (Valley, Bavaria). The branch of the House of Wittelsbach which descended from him, was named after these possessions.

Otto married Adelaide of Weilheim. Together, they had five children:

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