Thomas Koch, a glazier (Glaser), his wife Anna Belenski, and children (Heinrich, age 4; Angela, age 1) are recorded on the 1767 census of Katharinenstadt in Household No. 59. They had settled there on 27 August 1766.
Thomas Koch (age 38), a painter (Maler), his wife Anna née Bilenski, and children (Angela, age 9; Wilhelmina Roberta Karolina, age 7; Heinrich, age 1; Christian, age ½) are recorded on the 1776 Katharinenstadt Grundbuch [Land Register] in Household No. 84 along with a note about the birth of an additional child Maria Sophia on 29 May 1777.
The 1767 census records that Thomas Koch came from the Dutch village of Arnheim in Holland. The 1776 Katharinenstadt Land Register records that Thomas Koch was born in the village of Arnheim in the Gelderland region of Holland and that Anna née Bilenski was born in the village of Hohten [?] in Denmark.
- 1776 Katharinenstadt Grundbuch [Land Register] (Household No. 84).
- Mai, Brent Alan. 1798 Census of the German Colonies along the Volga: Economy, Population, and Agriculture (Lincoln, NE: American Historical Society of Germans from Russia, 1999): Ka011, Ka081, Ka109.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Der Göttinger Arbeitskreis, 2001): 289.
Brent Mai