Karl Rauschenbach, a merchant, and his wife Johanna settled in the Volga German colony of Katharinenstatdt on 3 August 1767. They are recorded there on the 1767 census in Household No. 20.
In 1792, Gottfried Rauschenbach moved from Nieder-Monjou to Katharinenstadt.
The 1767 census records that Karl Rauschenbach came from the German town of Leipzig.
- 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): Ka033, Mv1919.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 189.