Valentin Seifert, a farmer, his wife and 4 children immigrated to Denmark (Schleswig-Holstein) in 1762. They are last recorded among the Danish colonies on 22 April 1765.
Valentin, his wife Maria Elisabeth, and their children (Dorothea Elisabeth, age 15; Gottlieb, age 13; Christina Louisa, age 1) settled in the Volga German colony of Fischer on 7 July 1766. They are recorded there on the 1767 census in Household No. 27.
The 1767 census records that Valentin Seifert came from the Polish village of Madrizi [?].
- 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-1572.
- 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): Fs33.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 1999): 415.