Nils Petersen (age 5) and his brother Karl Christian Petersen (age 1½) are recorded on the 1767 census of Schwed in Household No. 8 along with their mother Katharina Neumann, widow of Mattias Neumann.
The 1767 census records that Katharina Neumann (and presumably her sons) came from the Danish town of Copenhagen.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 142.