Johann Adam Engel, son of Christoph Engel & Justina Elisabetha Krieger from Schierstein, married Anna Margaretha Mattern, daughter of Heinrich Mattern & Elisabetha Margaretha Arnold, on 11 February 1764 in the Catholic Church in Landau (aka Landau in der Pfalz), an autonomous (kreisfrei) town surrounded by Kreis Südliche Weinstraße.
Anna Margaretha Mattern was born 1 November 1736 in Kloster Klarental, today located in the municipality of Wiesbaden.
Johann Adam Engel's family emmigrated to Russia arriving in the colony of Beauregard on 27 August 1766. They are recorded there in 1767 census, as Lutherans, in Household No. 13.
Son Christoph & his family had moved to Reinhard in 1788 where they are recorded on the 1798 Census in Household No. Rh18.
- Mai, Brent Alan. 1798 Census of the German Colonies along the Volga: Economy, Population, and Agriculture (Lincoln, NE: American Historical Society of Germans from Russia, 1999): Bo33, Bo34, Rh18, Mv1078.
- Parish records of Landau in Pfalz Stadt (LDS Film No. 488340).
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Der Göttinger Arbeitskreis, 1999): 180.
- Schmidt, Natalia. History in Miniatures: Individual Volga Colonies (Kaliningrad: Kaliningrad Books, 2020): 135-136.