Otto I. von Northeim Herzog von Bayern
- Born: 1015, Northeim, Hanover, Prussia, Germany
- Marriage (1): Richenza Gräfin von Werl-Northeim in 1050
- Died: 11 Jan 1083, Bursfelde, Hannoversch-Münden, Göttingen, Lower Saxony, Germany aged 68
FamilySearch ID: GKXG-S74.
Otto married Richenza Gräfin von Werl-Northeim, daughter of Otto and Frau Otto von Lothringen, in 1050. (Richenza Gräfin von Werl-Northeim was born in 1025 in Werl, Arnsberg, North Rhine-Westphalia, Germany, christened about 1029, died on 11 Jan 1083 in Northeim, Northeim, Niedersachsen, Germany and was buried before 11 Jan 1083.)
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