Heinrich Mainz, a farmer, and his wife Katharina arrived from Lübeck at the port of Oranienbaum on 3 June 1766 aboard the galliot Adler under the command of Skipper Paul Adolph Drath.
They settled in the Volga German colony of Dinkel on 12 May 1767 and are recorded there on the 1767 census in Household No. 3.
The 1767 census records that Heinrich Mainz came from the German village of Begant in the Mecklenburg-Schwerin area.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 1999): 298.
- Pleve, Igor. Lists of Colonists to Russia in 1766: Reports by Ivan Kulberg (Saratov: Saratov State Technical University, 2010): #689.