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.
Johann Jakob Kohlmann, a farmer, his wife Gertrude, and children (Barbara, age 4; Johannes, age 2; Jakob, age ¼) are recorded on the 1767 census of Schuck in Household No. 23. They had settled there on 18 July 1766.
Jakob Kohlmann and his family are recorded on the 1798 census of Schuck in Households No. Su28 & Su29.
The 1767 census records that Johann Jakob Kohlmann came from the German village of Alzey in the Kurpfalz region.
- 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.