Parent of a Volga German.
Niklous Schloetzer was born in October of 1680 in the Weitenau, Loerrach, Baden in what is now Germany, to parents Martin Schlotzer and Anna Rack. Weitenau is in southwestern Germany, less than 20 miles from both the French and Swiss borders. This is mentioned because it may influence the ancestry of the Schloetzer and Bartelmos familes.
Niklous' first name is spelled two different ways in the two sources listed, and both are likely not correct. I will continue to search for additional records to try to discern the correct spelling.
Birth Record 
NIklous and his wife Anna Magdalena (Bartelmos) Schuppe are named in their daughter Susanna's birth record. Susanna Margaretha immigrated to Denmark and then Russia with her husband Wilhelm Schuppe.
Birth Record for Daughter Susanna Margaretha 
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Niklous is 26 degrees from Charles Grey, 28 degrees from Henry Herbert, 35 degrees from William Cobbett, 29 degrees from William Lamb, 36 degrees from James Lush, 37 degrees from David Heath, 30 degrees from Mary Ann Withers, 33 degrees from Robert Blake, 47 degrees from William Dove, 37 degrees from Richard Venfield, 37 degrees from James House and 29 degrees from Karen Stewart on our single family tree. Login to find your connection.