Johann Burkhard Bock and Magdalena Stock were married in Büdingen on 5 Mar 1766. According to the church records of the Evangelische Kirche Altenhasslau, Johann Bernhard Bock was born 13 Sep 1745 and christened 15 Sep 1745 in Altenhasslau. His parents were Johann Berghard Bock and his first wife Anna Margaretha Waller. Christina Bock was born 26 Jan 1753 and christened 28 Jan 1753 in Altenhasslau. Her parents were Johann Berghard Bock and his second wife Anna Margaretha Braun. Christina married Friedrich Krebs. Both couples arrived in Russia on 31 Mar 1766. The Bock couple is reported on the Frank First Settler's List, Family #18, and the Krebs couple is reported in Family #16.
- Parish records of Altenhaßlau (Lutheran), Gelnhausen, Archive of the Evangelical Church of Kurhessen-Waldeck in Kassel, on Archion.de
- Pleve, Igor. Lists of Colonists to Russia in 1766: Reports by Ivan Kulberg (Saratov: Saratov State Technical University, 2010) pp. 59-60
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 1999): pp. 421-422