Kaspar Koch, a farmer from Erbach, and his family arrived from Lübeck at the port of Oranienbaum on 31 July 1766 aboard a Russian packet-boat under the command of Lieutenant Pyotr Malinkov.
They settled in the Volga German colony of Dietel on 1 July 1767 and are recorded there on the 1767 census in Household No. 36.
Christian Koch from Dietel and his family are recorded on the 1857 census of Ährenfeld.
The 1767 census records that Kaspar Koch came from the German village of Soldinin near Elbin.
- 1857 Ährenfeld Census.
- 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): Dt30, Dt31.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 1999): 293.
- Pleve, Igor. Lists of Colonists to Russia in 1766: Reports by Ivan Kulberg (Saratov: Saratov State Technical University, 2010): #2802.