Widower Johann Werth, a farmer, and his daughters (Julianna, ae 12; Margaretha, age 3) are recorded on the 1767 census of Nieder-Monjou in Household No. 70. They had settled there on 3 August 1767.
The 1767 census records that Johann Werth came from the German village of Breitenbach.
There are no known surviving male lines of this Werth family among the Volga German colonies.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 200.