A lot of scholars believe there is a connection between “Rus”, “Russia” and a part of Sweden located just north east of Stockholm today called “Roslagen”.
During the reign of Stalin, this idea had some followers in the Soviet Republic, but it got banned.
The whole Germanic Rus theory got banned in the Soviet Union as a result of the war. Goebbels used it heavily in propaganda to “prove” the superiority of the German peoples compared to the slavic “untermenchen”
The truth is probably somewhere in between, and as elsewhere the Scandinavian viking folk quickly integrated into the local populace. For having founded Russsia, these early Swedes left precious little mark after them. The rulers only kept norse names for 2-3 generations if I recall correctly, before adopting slavic names.
Cheers.