Anna was born about 1772. She passed away after 1812.
https://familysearch.org/ark:/61903/1:1:N89W-KQ8
Anna Susanna Arndt Deutschland Heiraten, 1558-1929 Name: Gottlieb Mittelstaedt Spouse's Name: Anna Susanna Arndt Event Date: 01 May 1796 Event Place: Czarnikau, Posen, Preußen, Germany Father's Name: Christoph Mittelstaedt Spouse's Father's Name: Johann Arndt
Citation "Deutschland Heiraten, 1558-1929," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:N89W-KQ8 : 11 February 2018), Gottlieb Mittelstaedt and Anna Susanna Arndt, 01 May 1796; citing Czarnikau, Posen, Preußen, Germany; FHL microfilm 1,191,147.
Have you taken a DNA test? If so, login to add it. If not, see our friends at Ancestry DNA.
A > Arndt | M > Mittelstaedt > Anna Susanna (Arndt) Mittelstaedt