Johann Friedrich Ruf, a day laborer and son-in-law of Christian Benner, migrated with his wife and son from Württemberg to Denmark (Schleswig-Holstein) in 1762. In 1765, they joined the immigration to Russia.
They settled in the Volga German colony of Holstein on 2 May 1766 and are recorded there on the 1767 census in Household No. 32.
In 1788, Christoph Ruf moved from Holstein to Schwab.
Johann Christoph Ruf and and his family are recorded on the 1798 census of Schwab in Household No. Sb42.
Johann Heinrich Ruf, son of Johann Christoph Ruf, and his family are recorded on the 1834 census of Schwab in Household No. 75.
Heinrich Peter Ruf, son of Johann Heinrich Ruf, and his family moved from Schwab to Galka between 1834 & 1850.
Johann Peter Ruf, son of Johann Christoph Ruf, and his family are recorded on the 1834 census of Schwab in Household No. 77.
Georg Adam Ruff, son of Johann Peter Ruff, and his family moved from Schwab to Oberdorf in 1852.
Georg Adam Ruff from Schwab and his family are recorded on the 1857 census of Oberdorf in Household No. 10.
In 1790, Johann Adam Ruf moved from Holstein to Galka.
- 1834 Schwab Census (Households No. 75, 77).
- 1850 Schwab Census (Households No. 114, 116).
- 1857 Oberdorf Census (Household No. 10).
- 1857 Schwab Census (Households No. 114, 116).
- 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): 570.
- 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): Gk34, Ho27, Sb42, Mv0900, Mv0905.