Johann Philipp Sommer, a carpenter (Zimmermann), his wife Maria Barbara, and children (Anna Rosina, age 10; Georg, age 1) are recorded on the 1767 census of Kratzke in Household No. 47. They had settled there on 8 May 1767.
The 1767 census records that Johann Philipp Sommer came from the German village of Kemberg.
There are no known surviving male lines of this family among the Volga German colonies.
- Mai, Brent Alan. 1798 Census of the German Colonies along the Volga (Lincoln, NE: American Historical Society of Germans from Russia, 1999): Kr13, Mr03.
- Pleve, Igor. Einwanderung in das Wolgagebiet 1764-1767 Band 2 (Goettingen: Der Göttinger Arbeitskreis; 2001): 460.