Johann Georg Leonhard, a farmer, his wife Anna Katharina, and children (Philipp, age 13¼; Anna Katharina, age 7) arrived from Lübeck at the port of Oranienbaum on 19 July 1766 aboard a pinque named Каргополь (Kargopol: a Russian City) under the command of Captain Lieutenant Moses Davydov.
Johann Georg Leonhard, a farmer, his wife Anna Eva Weilinger, and children (Philipp, age 15; Anna Katharina, age 9; Franz, age 1 month) are recorded on the 1767 census of Köhler in Household No. 80. They had arrived in Köhler on 21 August 1767.
In 1790, Franz Leonhard moved from Köhler to Semenovka.
The Oranienbaum passenger list records that Johann Georg Leonhardt came from the German region of Baden. The 1767 census records that Johann Georg Leonhard came from the German village of Kirchberg in the Baden region.
- Idt, Andreas and Georg Rauschenbach. Auswanderung deutscher Kolonisten nach Russland im Jahre 1766 (Moscow: Idt & Rauschenbach, 2019): 31.
- Idt, Andreas and Georg Rauschenbach. Deutsche Kolonisten im Jahr 1766 in Oranienbaum und in den Siedlungsorten: Die Kuhlberg-Listen (Moscow: Idt & Rauschenbach, 2024): 541.
- 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): Kl59, Kl74, Se05, Mv1317.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Der Göttinger Arbeitskreis, 2005): 379.
- Pleve, Igor. Lists of Colonists to Russia in 1766: Reports by Ivan Kulberg (Saratov: Saratov State Technical University, 2010): #4194.
Brent Mai