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 in Schleswig-Holstein until 6 June 1763. They emigrated to Russia and settled in the Volga German colony of Schilling . 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.
- 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).
- Parish records of Grünwettersbach (LDS Film No. 1189466).
- Parish records of Seckenheim (LDS Film No. 1272728).