Bernhardus Bersa, a farmer, and his wife Margaretha settled in the Volga German colony of Ober-Monjou on 23 July 1767. They are recorded there on the 1767 census in Household No. 37.
In 1782, widow Bernhard Bersa moved from Ober-Monjou to Wittmann.
Widower Bernhard Bersa and the family of his stepson are recorded on the 1798 census of Wittmann in Household No. Wm16.
The 1767 census records that Bernhardus Bersa came from the German village of Leidendorf.
There are no known surviving male lines of this family among the Volga German colonies.
- 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): Wm16, Mv2060.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 297.