Johann Jacob Repp, the son of Johann Heinrich Repp, was born on 10 March 1728 in Hain-Gründau. Maria Elisabeth Hirchenhaÿn, the daughter of Conrad Hirchenhaÿn, was born on 2 September 1734, also in Hain-Gründau. Jacob Repp and Elisabeth Hirchenhaÿn were married in Büdingen on 11 April 1766.
This couple immigrated to Russia, arriving from Lübeck at the port in Oranienbaum on 8 August 1766. They settled in the Volga German colony of Huck on 1 July 1767. They are recorded there on the 1767 Census in Household No. 10 along with Maria Elisabeth Eisenhuth, the orphaned daughter of Christian Eisenhuth and Anna Maria Repp, the sister of Johann Jacob Repp.
- Mai, Brent Alan & Dona Reeves-Marquardt. German Migration to the Russian Volga (1764-1767): Origins and Destinations (Lincoln, NE: American Historical Society of Germans from Russia, 2003): 66.
- Parish records of Büdingen.
- Parish records of Hain-Gründau.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 142.
- Pleve, Igor. Lists of Colonists to Russia in 1766 (Saratov: Saratov State Technical University, 2010): 212.