Johann Georg Büchner was born in 1743. He was living in Schafheim at the time that he married on 6 March 1764 in Ober-Ramstadt to Dorothea Sophia Kuhlmann, daughter of Johann Andreas Kuhlmann & Susanna Maria Lämmermann. Dorothea Sophia had been born in Ober-Ramstadt on 7 November 1743.
They immigrated to Russia arriving in the Volga German colony of Laub on 12 Jul y 1767. They are recorded there on the 1767 Census in Household No. 3 along with children Johann (age 4) and Katharina (age 1).
On the 1798 Census of Laub, their children are living in Households No. Lb05 and Lb41.
Kirschnick, Ulrich. Ortsfamilienbuch Ober-Ramstadt (Online)
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).
Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 20.