Christoph Irle, a farmer, his wife Dorothea, and children (Cecilia, age 15½; Barbara, age 13; Maria Elisabeth, age 10; Valentin, age 8) are recorded on the 1767 census of Semenovka in Household in Household No. 4. They had settled there on 24 July 1767.
The 1767 census records that Christoph Irle came from the German village of Hammelburg in the Fulda region.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 178.