Johann Heinrich Alt, son of Leonhard Alt & Anna Barbara Kohlhepp, was born 27 September 1734 in Oberzel, Schwarzenfels. He married in Büdingen to Anna Gertruda Vogel, daughter of Johannes Vogel & Gertrudis Dorn. She had been born in Weichersbach, Schwarzenfels, on 29 April 1741.
Büdingen Parish Records (LDS Intl Film 1197023)
Oberzell and Weichersbach church records found in Mottgers Parish books by Clem Schreiber of Schluechtern, Hesse, Germany, professional researcher. - Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005).