Johann Eberhard Brock (12), a single day-laborer, settled in the Volga German colony of Katharinenstadt on 27 August 1766. He is recorded there on the 1767 census in Household No. 213.
The 1767 census records that Johann Eberhard Brock came from the German village of Wallbach.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 319.