Johann Friedrich Hasselbach, a single locksmith (Schlosser), settled in the Volga German colony of Merkel on 28 August 1766. They are recorded there on the 1767 census in Household No. 42.
The 1767 census records that Johann Friedrich Hasselbach came from the German district of Hamburg.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 128.