In 1792, Wilhelm Heinz and his family moved from Semenovka to Köhler.
Wilhelm Heinz from Semenovka and his family are recorded on the 1798 census of Köhler in Household No. Kl90.
There are no known surviving male lines of this Heinz family among the Volga German colonies.
- 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): Kl90, Mv2736.