Johannes Adler and Anna Dorothea Dey were married 30 November 1729 in Langendiebach. They have one known son, Johannes, born 3 May 1748 in Gettenbach, today part of the Gründau municipality. Anna Dorothea Dey had been born 23 May 1708 in Mittelgründau. The Dey line can be traced back several generations in Mittelgründau.
Son Johannes arrived in Russia with his widowed mother. They settled in the colony of Kolb on 13 May 1767 and are recorded there on the 1767 census in Household No. 12.
- 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): Ko04.
- Parish records of Gründau (Archion.de)
- Parish records of Gelnhausen (Archion.de)
- Archive of the Evangelical Church of Kurhessen-Waldeck in Kassel (Archion.de)