Mathias Brecht, his wife Eva, and children (Konrad, age 3½; Eva Katharina, age ½) immigrated to Denmark (Schleswig-Holstein) arriving in the city of Schleswig on 9 May 1761.
In July 1763, they deserted the Danish colonies and joined the migration to Russia. They are recorded on the 1775 census of Schilling in Household No. 11.
The Eichhorns record that Mathias Brecht came from the German village of Spöck, Oberamt Karlsruhe, Baden-Durlach.
- 1775 Census of Schilling (No. 11)
- 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-175.
- 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): Sh011.