Jacob Sauermilch, a weaver (Weber), his wife Johanna Maria (age 34, and son Lorenz (age 3) immigrated to Denmark (Schleswig-Holstein) arriving in Flensburg on 19 September 1761.
They applied to leave the Danish colonies on 24 April 1765 and joined the migration to Russia.
Jacob, his wife Johanna Maria (age 37), and children (Lorenz, age 9; Johann Friedrich, age 5; and Eva Christina, age 1) settled in the Volga German colony of Rosenheim on 15 March 1766. They are recorded there on the 1767 census in Household No. 2.
In 1789, Lorenz Sauermilch moved from Rosenheim to Enders.
The 1767 census records that Jacob Sauermilch came from the German village of Kaltennordheim [?] in the Sachsen-Weimar region. The Eichhorns record that Jacob Sauermilch came from "Eisenach oder Fürstentum Isenburg oder aus Wiedeschen."
- 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-1404.
- 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): En25, Rm15, Rm23, Mv2467.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 61.