Which are these northern European nomadic people called?

Sápmi is the cultural region traditionally inhabited by the Sámi people. Sápmi is located in Northern Europe and includes the northern parts of Fennoscandia.

The region stretches over four countries: Norway, Sweden, Finland, and Russia. On the north it is bounded by the Barents Sea, on the west by the Norwegian Sea and on the east by the White Sea.

Despite being the namesake of the region, the Sami people are estimated to only make up around 5% of its total population.

No political organization advocates secession, although several groups desire more territorial autonomy and/or more self-determination for the region's indigenous population. The area was often referred to in English as Lapland, but this term is now deprecated.

The three Sami languages, which are mutually unintelligible, are sometimes considered dialects of one language. They belong to the Finno-Ugric branch of the Uralic family.

Almost all Sami are now bilingual, and many no longer even speak their native language. In the late 20th century there were from 30,000 to 40,000 Sami in Norway and about 20,000 in Sweden, 6,000 in Finland, and 2,000 in Russia.