Konrad Köhler, a farmer, and his family arrived from Lübeck at the port of Oranienbaum on 29 August 1766 aboard a ship under the command of Skipper Johann Skott.
Konrad died and his wife remarried to Valentin Markus. They settled in the Volga German colony of Krasnoyar on 20 July 1767 and the combined Markus and Köhler families are recorded there on the 1767 census in Household No. 38.
The 1767 census records that son Konrad Heinrich Keller came from the German village of Alsfeld in the Darmstadt region.
- 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): Ks027.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 424.
- Pleve, Igor. Lists of Colonists to Russia in 1766: Reports by Ivan Kulberg (Saratov: Saratov State Technical University, 2010): #3630.