Widower Sven Knopp, a coppersmith (Kupferschmied), settled in the Volga German colony of Kratzke on 7 August 1766. He is recorded there on the 1767 census in Household No. 21.
The 1767 census records that Sven Knopp came from the Swedish village of Tjunköping [Jönköping?].
There are no known surviving male lines of this family among the Volga German colonies.
- Pleve, Igor. Einwanderung in das Wolgagebiet 1764-1767 Band 2 (Goettingen: Der Göttinger Arbeitskreis; 2001): 454.