Johannes Berger, a cobbler (Schuhmacher), and his family settled in the Volga German colony of Kukkus on 26 June 1767. They are recorded there on the 1767 census in Household No. 40.
The 1767 census records that Johannes Berger came from the German village of Dierdorf in the district of Nassau.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 470.