Georg Zwetzig, a farmer, and his family immigrated to Denmark (Schleswig-Holstein), arriving in the city of Schleswig on 6 June 1761.
They left the Danish colonies on 30 April 1764 and joined the migration to Russia.
They settled in the Volga German colony of Shcherbakovka on 15 June 1765. They are recorded there on the 1767 census in Household No. 8.
The Eichhorns record that Georg Zwetzig came from the German Margravate of Baden-Durlach. The 1767 census records that Georg Zwetzig came from the German village of Spielberg.
- Eichhorn, Alexander, Jacob & Mary Eichhorn. The Immigration of German Colonists to Denmark and Their Subsequent Emigration to Russia in the Years 1759-1766 (Deiningen, Germany: Drukerei und Verlag Steinmeier GmbH & Co. Kg, 2012): B-1855.
- Mai, Brent Alan. 1798 Census of the German Colonies along the Volga: Economy, Population, and Agriculture (Lincoln, NE: American Historical Society of Germans from Russia, 1999): Sv06, Sv31, Sv49, Sv58.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 247.