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