Johann Conrad Stromberger, son of Georg Stromberger (1667 - 16 March 1733) and Anna Katharina Hartmann (18 September 1670 - 10 September 1736) was born 24 June 1698 in Spachbrücken, Dieburg, Hessen-Darmstadt. He married in Spachbrücken on 27 April 1730 to Anna Elisabeth Kopp, daughter of Johann Nikolaus Kob/Koop and Elisabeth Barbara Stochard. She was born 20 August 1709 in Reinheim.
They immigrated to Denmark (Schleswig-Holstein) in 1762. In 1766, they joined the migration to Russia.
They arrived from Lübeck at the port of Oranienbaum Russia on 9 August 1766 aboard the ship Strelna. [This information is reported by Dr. Igor Plehve, but the Stromberger family does not appear on the Oranienbaum passenger list of the Strelna on 9 August 1766.] Immigrating with them was their son Johann Georg Stromberger, born 10 October 1738 in Spackbrücken.
They settled in the Volga German colony of Dönhof on 21 July 1766 and are recorded there on the 1767 census in Households No. 27 & 28.
The 1767 census records that Conrad Stromberger came from the German region of Darmstadt.
- Eichhorn, Alexander, Jacob & Mary Eichhorn. The Immigration of German Colonists to Denmark and Their Subsequent Emigration to Russia in the Years 1759-1766 (Deiningen, Germany: Drukerei und Verlag Steinmeier GmbH & Co. Kg, 2012): B-1675, B-1676.
- Kohl, Gunnar and Helmut Ramge. Familienbuch Spachbrücken (Darmstadt: Deutsche Ortssippenbücher, 2001): 484-485.
- 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): Dh069, Dh091.
- Parish records of Spackbrücken (LDS Film #1190550).
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 1999): 348.