Widower Johann Gottlieb Just, a surgeon (Feldscher), settled in the Volga German colony of Merkel on 28 August 1766. He is recorded there on the 1767 census in Household No. 23.
The 1767 census records that Johann Gottlieb Just came from the town of Leipzig in Sachsen (Saxony).
There are no known surviving male descendants of this family among the Volga German colonies.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 124.