Johann Conrad Simon married Maria Catharina Buch on 17 September 1743 in the Lutheran Church of Merxheim, located 56 kilometers southwest of Mainz.
They had eight known children, each born in Merxheim: (1) Georg Daniel, baptized on 22 October 1744; (2) Johann Georg, baptized on 27 December 1745; (3) Johann Nicolaus, baptized on 15 September 1748; (4) Anna Elisabetha, born on 17 April 1751, and baptized on 19 April 1751; (5) Maria Sophia, born on 21 July 1754, and baptized on 25 July 1754; (6) Johann Wilhelm, baptized on 13 June 1756; (7) Johann Conrad, baptized on 24 August 1758; and (8) Johann Martin, baptized on 15 May 1763.
Johann Conrad Simon and his family immigrated to Russia. They departed from the port of Lübeck by the snow-brig Der Merkur, with the skipper Johann Heinrich Abelmann. Johann Conrad, his wife Maria Catharina and their surviving children (Johann Nicolaus, Maria Sophia, and Johann Martin) arrived in Oranienbaum on 8 August 1766. They arrived in the colony of Dietel on 1 July 1767 and are recorded there on the 1767 Census in Household No. 31.
Son Johann Nicolaus is still living in Dietel at the time of the 1798 Census – in Household No. Dt21.
There were two Simon families that settled in Dietel. The other one was headed by Georg Gottfried Simon.
- 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 Merxheim (LDS Film No. 493215).
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Der Göttinger Arbeitskreis, 1999): 291.
- Pleve, Igor. List of Colonists to Russia in 1766 "Reports by Ivan Kulberg" (Saratov: Saratov State Technical University, 2010): 221.