Family #57 in the 1767 Grimm census.
Family #133 in the 1775 Grimm census.
Family #161 in the 1798 Grimm census.
Johann Jost Hartmann was born about 1739 in the Isenburg area of what is now Germany. He married a woman named Eva Catharina prior to immigrating from Germany to Russia. He and Eva Catharina are listed in the Kulberg Reports as traveling under document number 4910.
The couple arrived in Russia on 10 August 1766 in the Russian pink Vologda. After making their way from Oranienbaum, Russia, to the Volga River, they settled in Grimm and are listed in the first census of that colony.
The town of Ilfeld and Elbingerode are further north than I would expect for a Volga German, but they still may be a match.
Name: Johann Just Hartmann
Gender: männlich (Male)
Event Type: Taufe (Baptism)
Birth Date: 11 Dez 1739 (11 Dec 1739)
Baptism Date: 15 Dez 1739 (15 Dec 1739)
Baptism Place: Hannover, Deutschland (Germany)
Father: Johann Hartmann
City or District: Elbingerode, Ilfeld u Kr
Pleve, Igor. List of Colonists to Russia in 1766, "Reports by Ivan Kulberg," Ministry of Education and Science of Russian Federation, Saratov State Technical University; Published in Saratov, Russia 2010; page 313, Johann Just Hartmann, farmer from Isenburg.
Pleve, Igor. Einwanderung in das Wolgagebiet 1764-1767, Band 2, Herausgegeben von Alfred Eisfeld under Mitarbeit von Sabine Eichwald, Published by the Nordost-Instsitut - 38085 Göttingen, 2005; page 81, family #57.
↑The 1775 and 1798 Census of the German Colony on the Volga, Lesnoy Karamysh, also known as Grimm; Published by the American Historical Society of Germans from Russia, Lincoln, Nebraska, USA; Published date: 1995; family #133 in the 1775 census.
↑The 1775 and 1798 Census of the German Colony on the Volga, Lesnoy Karamysh, also known as Grimm; Published by the American Historical Society of Germans from Russia, Lincoln, Nebraska, USA; Published date: 1995; family #161 in the 1798 census.