Johannes Kempel, son of Conrad Kempel, and Anna Clara Roth, daughter of Caspar Roth, were married 9 February 1750 in Rückingen. According to the Rückingen parish records, they had seven children born on the following dates: (1) Anna Clara, 26 August 1751; (2) Johann Christoph, January 1754 (died on 19 March 1754); (3) Johann Christoph, 24 May 1755 (died on 7 February 1763); (4) Johann Georg, 6 May 1757; (5) Johann Caspar, 10 May 1760; (6) Anna Amalia Wilhemina, 3 July 1762; and (7) Catharina Elisabetha, 27 February 1766.
The family immigrated to Russia arriving from Lübeck at the port of Oranienbaum on 18 June 1766 aboard the ship Die Perle with skipper Thomson at the helm.
They settled in the Volga German colony of Kolb on 13 May 1767. By the time of the 1767 Census of Kolb, Anna Clara Roth had remarried to Christian Reuber and she and son Johann Georg Kempel are recorded there in Household No. 2. Georg still resides in Kolb at the time of the 1798 Census, recorded there in Household No. Ko25.
- 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): 584.
- Parish records of Rückingen.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 386.
- Pleve, Igor. Lists of Colonists to Russia in 1766: Reports by Ivan Kulberg (Saratov: Saratov State Technical University, 2010): 89.