Philipp Bertsch, a craftsman (Handwerker), and his family settled in the Volga German colony of Mariental on 16 June 1766. They are recorded there on the 1767 census in Household No. 21.
In 1788, Jakob Bertsch and his family moved from Louis to Mariental.
The 1767 census records that Philipp Bertsch came from Luxembourg.
- 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): Mt18, Mv1581.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 100.