Widow Anna Elisabeth Ertel and her children settled in the Volga German colony of Schäfer on 25 May 1767. They are recorded there on the 1767 census in Household No. 46 along with Anna Elisabeth's new husband, Johannes Knaub and his child.
The 1767 census records that Anna Elisabeth Ertel came from the German region of Weimar.
- 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): Sf24.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 101.