Johann Jakob Berkus, a farmer, his wife Anna Maria, and children (Maria Magdalena, age 12; Urias, age 8) are recorded on the 1767 census of Göbel in Household No. 67. They had settled there on 20 June 1767.
The 1767 census records that Johann Jakob Berkus came from the Austrian village of Kage [?].
- Pleve, Igor. Einwanderung in das Wolgagebiet 1764-1767 Band 2 (Goettingen: Der Göttinger Arbeitskreis, 2001): 56.