Leonhard Schwemmler, a printer (Buchdrucker), and his family arrived from Lübeck at the port of Oranienbaum on 18 June 1766 aboard the ship Die Junger Friederika under the command of Skipper Christian Korsholm.
They settled in the Volga German colony of Preuss on 12 May 1767 and is recorded there on the 1767 census in Household No. 5.
In 1791, Peter Schwemmler moved from Preuss to Seelmann. In 1796, Ludwig Ignatius Schwemmler moved from Preuss to Neu-Kolonie.
The 1767 census records that Leonhard Schwemmler came from the German village of Ausbach.
- 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): Nk23, Sm28, Mv2358, Mv2367.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 414.
- Pleve, Igor. Lists of Colonists to Russia in 1766: Reports by Ivan Kulberg (Saratov: Saratov State Technical University, 2010): #958.