Answer: nibelungs

AnswerCrossword Clue
NIBELUNGSSiegfried won the hoard and ring from them.
NIBELUNGSGerman children of the mist.
NIBELUNGSMythical race of dwarfs.
NIBELUNGSScandinavian dwarfs of opera.
NIBELUNGSDwarfs, children of the mist.
NIBELUNGSWagnerian dwarfs.