Johann Wilhelm Schröder, a soldier (Soldat), and his family settled in the Volga German colony of Kratzke on 7 August 1766. They are recorded there on the 1767 census in Household No. 24.
The 1767 Kratzke census records that Johann Wilhelm Schröder came from the German village of Rostock in Mecklenburg.
- Mai, Brent Alan. 1798 Census of the German Colonies along the Volga (Lincoln, NE: American Historical Society of Germans from Russia, 1999): Kr27.
- Pleve, Igor. Einwanderung in das Wolgagebiet 1764-1767 Band 2 (Goettingen: Der Göttinger Arbeitskreis; 2001): 454.