[–] [deleted] ago
Yes Oslo does get the bulk of the migrants and has severe "ghettofication" in some areas. One reason it looks so bad for Oslo is probably that the stats are gathered county by county, but Oslo is both the largest city and a county.
As for names, it varies a lot year by year. Traditional Scandinavian names surge in popularity from time to time, then sink back down. It's an interesting phenomenon, which SSB (the central statistics bureau) keeps track of and publish reports on annually. You can almost estimate a person's age by their name if you dig a bit, and the SSB site has some interesting search functions and graphs to visualise it.
[–] Futt [S] ago
Source: SSB