Otto the Child Welf von Braunschweig-Lüneburg, Duke of Brunswick-Lunenburg, was born circa 1204 to Wilhelm von Braunschweig-Lüneburg (1184-1213) and Helen of Denmark (c1174-1233) and died 9 June 1252 Lüneburg, Lower Saxony, Germany of unspecified causes. He married Mechthild von Brandenburg (c1210-1261) 1228 JL .
Children
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