Peter Bonaventura Lachert, a cobbler (Schuhmacher), and his wife Margaretha are recorded on an appendix to the 1767 census of Boisroux in Household No. 7 along with a note that they resettled to the colony of Schaffhausen in 1768.
The 1767 census records that Peter Bonaventura Lachert came from the German village of Mannheim in the Kurpfalz region.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 1999): 163.