Margaretha (Margaret) Schwartz was born about 1754, daughter of Martin Schwartz and Margaretha Lohrmann, and was old enough to sponsor a baptism of Peter Schwartz, her nephew, in June 1770 at the Lutheran Church in Strasburg, Virginia, along with Frederick Mauck, who is assumed eventually became her husband. They married about 1775 and eventually moved on to Tennessee and then to southern Ohio, where she passed away by 1820.
https://www.wikitree.com/wiki/Schwartz-1069