Johann Wilhelm Obermüller, son of the deceased free foreigner Wilhelm Obermüller, is recorded on the 1798 census of Merkel in Household No. Mr21.
Georg Philipp Obermüller from Merkel is recorded on the 1857 census of Gnadentau.
- 1857 Gnadentau Census.
- 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): Mr11.