Georg Michael Keller, a farmer, and his family immigrated to Denmark (Schleswig-Holstein), arriving in Flensburg on 9 June 1762 as the servant of Christian Bleymeier.
His wife died, and he married Elisabeth, the widow of Johann Georg Ziegler. They were dismissed from the Danish colonies on 13 June 1763 and joined the migration to Russia.
They settled in the Volga German colony of Dobrinka on 15 April 1765.
The combined Keller/Ziegler family is recorded on the 1767 census of Dobrinka in Household No. 22.
The Eichhorns record that Georg Michael Keller came from the German village of Hiederhofen, Amt Brackenheim, Württemberg. The 1767 census records that Georg Keller came from the German village of Niederhof in the Württemberg region.
- 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-789.
- 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): Db76.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 1999): 319.