The Nebelung is a rare breed of the domestic cat. Nebelungs have long bodies wide-set green eyes long and dense fur and mild dispositions. The name Nebelung--apparently a portmanteau of the German word (Nebel) for Mist or Fog and a medieval Germanic saga Nibelungenlied--is perhaps derived from the cat's distinctive silky blue-grey coat as well as from the breed's progenitors Siegfried and Brunhilde named after two major figures in the Nibelungenlied.