Michael Grenz and his wife Maria arrived from Lübeck at the port of Oranienbaum on 31 July 1766 aboard a Russian ship under the command of Lieutenant Samuel Gibbs.
They settled in the Volga German colony of Holstein on 7 July 1767 and are recorded there on the 1767 census in Household No. 36.
The Oranienbaum passenger list records that Michael Grenz is a carpenter while the 1767 census records that he was a miller (Müller).
The 1767 census records that Michael Grenz came from the German village of Raibach near Darmstadt.
- 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): Ho23.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 134.
- Pleve, Igor. Lists of Colonists to Russia in 1766: Reports by Ivan Kulberg (Saratov: Saratov State Technical University, 2010): #2845.