Nibelungenlied (n.)

German epic poem of 13c., literally "song of the Nibelungs," a race of dwarves who lived in Norway and owned a hoard of gold and a magic ring, literally "children of the mist," from Proto-Germanic *nibulunga-, a suffixed patronymic form from *nebla- (source of Old High German nebul "mist, fog, darkness," Old English nifol), from PIE root *nebh- "cloud." With lied "song" (see Lied).