When Otto I. gen. das Kind Herzog von Braunschweig-Lüneburg was born in 1204, in Brunswick, Brunswick, Germany, his father, Wilhelm von Lüneburg, was 20 and his mother, Helena Valdemarsdatter of Denmark, was 24. He married Markgräfin Mathilde von Brandenburg von Braunschweig Lüneburg in 1228, in Brunswick, Germany. They were the parents of at least 4 sons and 6 daughters. He died on 9 June 1252, in Lüneburg, Lower Saxony, Germany, at the age of 48, and was buried in Brunswick, Lower Saxony, Germany.
Originally a short form of any of the various Germanic compound personal names containing the element od, ot ‘prosperity, wealth’ ( compare the corresponding Old English ēad in names such as Edward and Edwin ). St Otto of Bamberg ( d. 1139 ) was a missionary to the Pomeranians. Otto the Great ( 912–73 ) is generally regarded as the founder of the Holy Roman Empire, and the name has been borne by several members of German and Austrian royal houses. It was recorded occasionally among immigrants to England from the Low Countries in the 14th century, but failed to establish itself. Since the 19th century it has again been used occasionally in the English-speaking world, mostly among immigrants from Germanic countries.
BIO: from http://fmg.ac/Projects/MedLands/BRUNSWICK.htm#OttoIdied1252A as of 4/29/2016 OTTO von Lüneburg (1204-Braunschweig 9 Jun 1252, bur Braunschweig Cathedral). “Willelmus de Luneburch...coniug …
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