Johann Gottfried Seibert is recorded on the 1767 census of Dönhof in Household No. 109 along with a note that he and his wife are living in Saratov.
No further information is recorded about him.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 1999): 370.