Zacharius Schredo, a single man, settled in the Volga German colony of Merkel on 28 August 1766. They are recorded there on the 1767 census in Household No. 17.
The 1767 census records that Zacharius Schredo came from the German village of Zellerfeld in the region of Braunschweig.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 123.