In 1788, Friedrich Zerr moved from Kukkus to Straub.
The widow and children of Heinrich Zerr are recorded on the 1798 census of Straub in Household No. Sr34.
- 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): Sr34, Mv1439.