Stephan Bartheis [sic], his wife Judith, and children (Johannes, age 20; Christina, age 18; Peter, age 16) arrived from Lübeck at the port of Oranienbaum on 10 August 1766 aboard a ship under the command of Skipper Nikolaus Peter Pink.
They settled in the Volga German colony of Ober-Monjou on 3 August 1767 and are recorded there on the 1767 census in Household No. 73.
In 1784, Peter Bertus and his family moved from Ober-Monjou to Mariental.
The Oranienbaum passenger list records that Stephan Bartheis [sic] was a farmer from the German region of Mainz. The 1767 census records that Stephan Bartis [sic] was a barber (Friseur) from the German village of Besers [?] [Besseringen?] in the Mainz region.
Subsequent generations spell this surname as Bertus.
- 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): Mt16, Mv2067.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 306.
- Pleve, Igor. Lists of Colonists to Russia in 1766: Reports by Ivan Kulberg (Saratov: Saratov State Technical University, 2010): #4212.