Njarar or Njars were an ancient Germanic people of Närke, Sweden, that appears in the Scandinavian version of the Lay of Weyland the smith. In the early part of the lay, King Níðuðr is introduced as a king in Sweden:
Later he is specified as the lord of the Njars:
The Njars probably lost their independence early to the Swedish king at Uppsala, and they are not mentioned by Jordanes in his thorough listing of tribes in Scandza, in the 6th century. There are few mentions of the Njarar/Nerikjar in Old Norse sources, but for exceptions see King of Nerike.
References
Njars Wikipedia(Text) CC BY-SA