Johann Jakob Kohlmann, son of Johannes Kohlmann & Anna Barbara Gruber, was baptized on 2 April 1734 in Alzey, Rheinhessen. He married there in August 1764 to Gertrude Schmitt. They had earlier had a daughter, Barbara, baptized on 12 May 1764 in Alzey.
The family immigrated to Russia, arriving in Schuck on 18 July 1766. They are recorded there on the 1767 Census in Household No. 23.
- Mai, Brent Alan. 1798 Census of the German Colonies along the Volga (Lincoln, NE: American Historical Society of Germans from Russia, 1999): Su28, Su29.
- Parish records of Alzey (LDS Film No. 996676).
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 115.