The nomadic reindeer herders of northern Europe are called the

The nomadic reindeer herders of northern Europe are called the Sami.

Explanation:

1. The northern Europe covers parts of north Sweden, Norway, Finland and Russia.

2. Sapmi is the region which is occupied by the Sami people.

3. Sami were recognized as Lapps and Laplanders. Lapp is a piece of clothing which is worn by the reindeer herders.

4. The hunting of reindeers decreased the availability of reindeers for Sami people. This led to the cultivation and taming of reindeers since reindeer herding was the only source of living for Sami group. This took the form of reindeer husbandry.