Interesting question Jukka
Looking at the second source clip we find a huge number of Nordic sounding names.
Can't be a coincidence really
John Korpi (Johan Korp)
Arne Kallio (brother)
Axel Kilponen
Gust Korpi (Gustaf Korp)
John Warpula
Reino Salonen (maybe a relative to Matti?
)
etc
There is even a Walter Suomi
I doubt anyone takes such a name without having a clear ancestry back to Finland
Greetings from a friendly neighbour in Sweden.
Cheers
Stig