Widow Anna Katharina Merkel and her children (Johannes, age 11; Maria Christina, age 8) are recorded on an appendix to the 1767 census of Nieder-Monjou in Household No. 102 along with a note that they settled in the Volga German colony of Paulskaya in 1768.
Johann[es] Merkel and his family are recorded on the 1798 census of Basel in Household No. Bs40.
The death of Johannes Merkel in 1819 is recorded on the 1834 census of Basel in Household No. 66.
The 1767 census records that Anna Katharina Merkel came from the German region of Darmstadt.
- 1834 Basel Census (Households No. 4, 45, 46, 66, 90, 99, 103).
- 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): Bs40.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 222.