Johann Leonhardt, a farmer, and his family arrived from Lübeck at the port of Oranienbaum on 8 August 1766 aboard a ship under the command of Skipper Martin Friedrich Morkau.
They settled in the Volga German colony of Urbach on 3 July 1767 and are recorded there on the 1767 census in Household No. 35.
The 1767 census records that Johannes Leonhardt came from the German region of Trier.
- 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): Ur29.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 278.
- Pleve, Igor. Lists of Colonists to Russia in 1766: Reports by Ivan Kulberg (Saratov: Saratov State Technical University, 2010): #2956.