Wilhelm Christian Mannenger, a farmer, and his wife Maria are recorded on an appendix to the 1767 census of Beauregard in Household No. 1 along with a note that they relocated to the colony of Biberstein in 1768.
The 1767 census records that Wilhelm Christian Mannenger came from the German region of Mecklenburg.
- Pleve, Igor. Einwanderung in das Wolgagebiet 1764-1767 Band 1 (Goettingen: Der Göttinger Arbeitskreis, 1999): 194.