Wilhelm Reis, a farmer, and his family immigrated to Denmark (Schleswig-Holstein), arriving in Fridericia on 19 January 1761. They were last recorded in the Danish colonies on 26 April 1763.
They joined the migration to Russia and settled in the Volga German colony of Shcherbakovka on 15 June 1765. They are recorded there on the 1767 census in Household No. 7.
The Eichhorns record that Wilhelm Reis came from the German village of Mannheim. The 1767 census records that Wilhelm Reis came from the German village of Petershain.
- 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-1325.
- 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): Sv05.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 247.