Maria Katharina Jung (age 12) and her siblings Katharina (age 11), Johannes (age 10), and Johann Nikolaus (age 7) settled in the Volga German colony of Rohleder on 14 June 1766. They are recorded there on the 1767 census in Household No. 15 along with their mother and stepfather, Jakob Kapp.
- Mai, Brent Alan. 1798 Census of the German Colonies along the Volga: Economy, Population, and Agriculture (Lincoln, NE: American Historical Society of Germans from Russia, 1999): Rl34.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 51.