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Male Duke of Brunswick Otto Click to view Duke of Brunswick Otto in the family tree

Duke of Brunswick was born about 1232.  Duke of Brunswick's father was Otto I "das Kind" and his mother was Margravine of Brandenburg Mathilde.  His paternal grandparents were Duke of Brunswick Wilhelm and Princess of Denmark Helene; his maternal grandparents were II Albrecht and Margravine of Lower Lusatia Mathilde. He had three brothers and six sisters, named Albrecht, I, Duke of Brunswick, Matilde, Duchess of Brunswick, Duchess of Brunswick, Duchess of Brunswick, Duchess of Brunswick-Lüneburg and Duchess of Brunswick-Lüneburg.  He was the fourth oldest of the ten children.

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