Widow Rosina Zwinger and her children immigrated to Denmark (Schleswig-Holstein). Her son Johannes arried in Flensburg on 2 February 1762. Rosina and two additional children (Christina, age 19; Johann Georg, age 14) arrived in Flensburg on 12 June 1762.
They left the Danish colonies on 22 April 1765 and joined the migration to Russia.
Rosina settled in the Volga German colony of Kamenka on 6 July 1765. Her son Johann, a farmer, and his wife Christina settled there on 28 April 1766. They are recorded on the 1767 census of Kamenka in Households No. 41 and 46, respectively.
In 1787, Mattias Zwinger left Kamenka.
In 1795, Georg Zwinger and his family moved from Kamenka to Franzosen.
The 1798 census of Volmer records the Johann Georg Zwinger family from Kamenka in Household No. Vm37.
The Eichhorns and the 1767 census record that this Zwinger family came from the German region of Baden-Durlach.
- 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-1856, B-1857.
- 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): Vm37.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 226, 267.