Heinrich Keil, a farmer, his wife Katharina, and sons (Rudolf, age 22; Jakob, age 21; August, age 16; Ludwig, age 15) are recorded on an appendix to the 1767 census of Beauregard in Household No. 69 along with a note that they settled in the colony of Biberstein in 1768.
Katharina Keil from Biberstein and her family are recorded on the 1798 census of Bettinger in Household No. Bt33.
Johann Martin Keil from Biberstein and his family are recorded on the 1798 census of Zürich in Household No. Zr15.
The 1767 census records that Heinrich Keil came from the German village of Haldorf in the Hannover region.
- Mai, Brent Alan. 1798 Census of the German Colonies along the Volga (Lincoln, NE: American Historical Society of Germans from Russia, 1999): Bt33, Bb26, Bb28, Bb33, Zr15.
- Pleve, Igor. Einwanderung in das Wolgagebiet 1764-1767 Band 1 (Goettingen: Der Göttinger Arbeitskreis, 1999): 210.