Johann Caspar Grün, son of Johann Heinrich Wilhelm Grün (5 July 1711 - 6 June 1773) & Anna Margaretha Noß (4 December 1712 - 22 April 1773), was baptized on 13 December 1738 in Wolf near Büdingen. At the time, this area was part of the county of Isenburg. He married there on 3 November 1763 to Gertrude Elisabeth Geiß, daughter of Heinrich David Geiß & Eva Katharina Hencken.
They arrived in Norka on 15 August 1767 and are recorded there on the 1767 Census at Household No. 32.
- Parish records for Wolf (included with those of Dudenrod and Pferdsbach).
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 237.