Britannica lays it out for you, and yet you tilt at someone that lives there (vidarh) telling you the same?
> Scandinavia, part of northern Europe, generally held to consist of the two countries of the Scandinavian Peninsula, Norway and Sweden, with the addition of Denmark.
You've been found wanting in your claims.
> Some authorities argue for the inclusion of Finland on geologic and economic grounds and of Iceland and the Faroe Islands on the grounds that their inhabitants speak North Germanic (or Scandinavian) languages related to those of Norway and Sweden. Typically, when these other areas are added to Norway, Sweden, and Denmark, the group is called the "Nordic countries.”