Surprise: there is a Helsinkigade in Copenhagen! It is in Nordhavn, the urban swanky neighborhood built on a landfill island and housing among other the regional UN/WHO headquarters.
Also, there is a Suomisvej in Copenhagen, in Frederiksberg on the side of one of the lakes. Suomi is Finland in Finnish – wonder what its history is?
(Copenhagen, Denmark; May 2020)