Both the Stumpp book at the Facius List report that Friedrich Krebs was from Großenhausen, which is one of the towns in the Altenhaßlau parish. Johann Friedrich Krebs was baptized on 25 May 1740 in the Altenhaßlau Lutheran church. His parents were Johann Georg and Susanna Krebs.
The Büdingen marriages report that Friedrich Krebs married Christine Bock on 7 Mar 1766. Anna Christina Bock was the half-sister of Johann Burkhard Bock who also emigrated to Russia. The couple arrived in Russia on 31 May 1766. They settled in Frank and are reported there on the First Settler's List in Family #16.
- Parish records (Lutheran) of Altenhaßlau on Archion.de.
- Facius List extractions
- Stumpp, Karl. The emigration from Germany to Russia in the years 1763 to 1862. (Lincoln, NE: American Historical Society of Germans from Russia, 1982), p. 140
- Mai, Brent Alan and Dona Reeves-Marquardt. German Migration to the Russian Volga (1764-1767) (Lincoln, NE: American Historical Society of Germans from Russia, 2003), p. 48
- Pleve, Igor. Lists of Colonists to Russia in 1766: Reports by Ivan Kulberg (Saratov: Saratov State Technical University, 2010) p. 59
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 1999): p. 421