Nikolaus Zag and his wife Gertruda arrived from Lübeck at the port of Oranienbaum on 20 May 1766 aboard the Russian galliot Catharina Eleonora under the command of Skipper Peter Röder.
They settled in the Volga German colony of Köhler on 10 August 1767. He is recorded there on the 1767 census in Household No. 23 along with another wife Maria Magdalena. There is a note on the 1767 Köhler census that Nikolaus Zag moved to the colony of Semenovka in 1768.
The Oranienbaum passenger list records that Nikolaus Zag was a teacher of the German language while the 1767 census records that he was a farmer.
The 1767 census records that Nikolaus Zag came from the German village of Mondsee in Austria.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 365.
- Pleve, Igor. Lists of Colonists to Russia in 1766: Reports by Ivan Kulberg (Saratov: Saratov State Technical University, 2010): #260.