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

Otto was born in 1204 in Braunschweig, Brunswick, Germany.  Otto's father was Wilhelm von Brunswick and his mother was Helene of Denmark.  His paternal grandparents were Duke Henry von Sachsen V of Saxony & Bavaria and Princess Matilda of England; his maternal grandparents were King Valdemar Knudsen I of Denmark and Sofiya Vladimoroyna Of Novgorod.  He was an only child.  He died at the age of 48 on July 9th, 1252.


Otto's family with Mathilde von Brandenburg

‌Otto and Mathilde were married in a religious ceremony in 1228.  They had a son named "the Great".

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