Justus Grohmann, a mason (Maurer), and his family arrived from Lübeck at the port of Oranienbaum on 4 July 1766 aboard the ship Der Junge Heinrich under the command of Skipper Henrich Niemann.
They settled in the Volga German colony of Dinkel on 27 July 1767 and are recorded there on the 1767 census in Household No. 35.
The 1767 census records that Justus Grohmann came from the German town of Kiel in the region of Holstein.
- 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): Dn13.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 1999): 306.
- Pleve, Igor. Lists of Colonists to Russia in 1766: Reports by Ivan Kulberg (Saratov: Saratov State Technical University, 2010): #2112.