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Male Johann I Margrave von BRANDENBURG Click to view Johann I Margrave von BRANDENBURG in the family tree

Johann I Margrave's father was ALBRECHT II MARGRAVE von BRANDENBURG and his mother was MATHILDA von NIEDER-LAUSNITZ.  His paternal grandparents were OTTO I MARGRAVE von BRANDENBURG and JUDYTA de POLAND; his maternal grandparents were KONRAD MARGRAVE von NIEDER-LAUSNITZ and ELIZABETH de POLAND. He had a brother and two sisters, named OTTO III MARGRAVE, MATHILDA and Jutte.

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