Heinrich Rothler, a farmer, and his family arrived from Lübeck at the port of Oranienbaum on 4 July 1766 aboard the Die Neue Freiheit von Bremen under the command of Skipper Steingrawer.
The settled in the Volga German colony of Preuss on 15 July 1767 where they are recorded on the 1767 census in Household No. 75.
In 1788, widower Heinrich Rothler moved from Preuss to Seelmann.
The 1767 census records that Heinrich Rothler came from France.
- 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): Ps61, Mv2338.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 425.
- Pleve, Igor. Lists of Colonists to Russia in 1766: Reports by Ivan Kulberg (Saratov: Saratov State Technical University, 2010): #2009.