Old Swedish name for a region in northern Sweden and Finland
Lappmarken, or Lapland (Swedish: Lappland), was the northern part of the old Kingdom of Sweden inhabited by the Sami people. In addition to the present-day Swedish Lapland, it also covered Västerbotten, Jämtland and Härjedalen, as well as the Finnish Lapland. As a name, it is related to Finnmark, an old Norwegian name for the Sami area. Finn and Lapp are mutually exchangeable old names for the Sami people, but both are now considered offensive. Already in the Middle Ages, Lappmarken consisted of "lappmarks" whose Sami people were loosely governed either by the crown or birkarls.
https://en.wikipedia.org/wiki/Lappmarken