Widower Nikolaus Hartmann, a farmer, is recorded on the 1767 census of Straub in Household No. 55 along with a note that his wife had died there on 25 October 1767. Another note records that he relocated to the colony of Warenburg in 1768.
The 1767 census records that Nikolaus Hartmann came from the German village of Rimbach in the Erbach region.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 243.