Johann Friedrich Mohr was born about 1725 in the Durlach area. He married to Maria Magdalena Hoerner, daughter of Georg Adam & Anna Catharina Hoerner, who had been baptized on 29 Jan 1727 in the Evangelical Church of Seckenheim, today a district in Mannheim southeast of the city center. They had two known children: (1) Johann Friedrich, born on 4 March 1757 and baptized in the Evangelical Church of Grünwettersbach, a borough of southern Karlsruhe, on 6 March 1757; and (2) Salome, born in 1759.
Johann Friedrich Mohr and his family emigrated to Denmark (Schleswig-Holstein), departing from Altona, Duchy of Holstein, on 29 June 1761, under the leadership of Johann Thomas Gabler. They arrived in the city of Schleswig, Duchy of Schleswig, on 4 July 1761.
They are recorded in Schleswig-Holstein until 6 June 1763. They immigrated to Russia and settled in the Volga German colony of Schilling where they are recorded on the 1775 census in Household No. 16. Widow Maria Magdalena and her family are recorded there on the 1798 Census in Household No. Sg015. Daughter Salome is recorded in Household No. Sg030.
- 1775 Schilling Census (No. 16)
- Eichhorn, Alexander. The immigration of German colonists to Denmark and their subsequent emigration to Russia in the years 1759-1766 (Deiningen, Germany: Steinmeier, 2012): 269, 527 & 685.
- 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): Sg015.
- Parish records of Grünwettersbach (LDS Film No. 1189466).
- Parish records of Seckenheim (LDS Film No. 1272728).