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Male Otto I, Duke Of BRUNSWICK & LUNEBURG Click to view Otto I, Duke Of BRUNSWICK & LUNEBURG in the family tree

Otto I, Duke Of was born in 1204 in Of Braunschweig,Braunschweig,Germany.  Otto I, Duke Of's father was Wilhelm Prince Of Saxony and his mother was Helene Princess of DENMARK.  His paternal grandparents were Heinrich V "The Lion" Von (The Lion) Sachsen & Bayern Duke Saxony & Bavaria and Mathilde Plantagenet; his maternal grandparents were Valdemar I 'the Great' King Of Denmark and Sofiya Vladimirovna Of Novgorod.  He was an only child.  He died at the age of 48 on June 9th, 1252.


Otto I, Duke Of's family with Mathilde D'Ascanie Of Brandenburg

‌Otto I, Duke Of and Mathilde were married in a religious ceremony in 1228.  They had four sons and six daughters, named Albrecht I Duke Of, Johann I, Otto, Konrad, Matilde, Margarethe, Helene Princess Of, Elisabeth, Adelheid Welf Von and Agnes Princess Of.

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