Friedrich Ost died before reaching the Volga German colonies. His widow, Elisabeth, remarried to Karl Röder.
They settled in the colony of Urbach on 13 July 1767 and are recorded there on the 1767 census in Household No. 6.
The 1767 census records that Elisabeth came from the German village of Frankenberg in the Hessen region.
There are no known surviving male lines of this Ost family among the Volga German colonies.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 271.