Richard Wagner's Der Ring Des Nibelungen is
commonly referred to in English as The Ring Cycle.
The individual operas are 1) Das Rheingold (The Rhine Gold), 2) Die
Walküre / Die Valküre (The Valkyrie), 3) Siegfried and 4)
Götterdämmerung (The Twilight
of the Gods). Wagner based his work largely on Old Norse sources
preserved in Iceland and to a lesser extent on the German heroic poem Nibelunglied.
Árni Björnsson notes in Wagner and the Volsungs: Icelandic
Sources of Der Ring Des Nibelungen that Wagner derived
Alberich's name from Albrich in the heroic poem Das
Nibelungenlied, and that Alberich is associated with Andvari in
the Icelandic Prose Edda and in the Old Norse
saga,Volsungs Saga, as well as Álfrekr in the
Old Norse saga, Þiðreks saga af Bern (c. 1250)
(132).
Árni Björnsson notes in Wagner and the Volsungs: Icelandic
Sources of Der Ring Des Nibelungen that Wagner invented the
names for the Rhinemaidens and that they were "largely Wagner's own
creation, though they may have been based on various folk tales...The
'Rhinegold' name is Wagner's own idea, but all of the sources used for
comparison here, except Þiðreks saga mention gold
in the river Rhine, a prize which men strive to possess (132-33).
Árni Björnsson notes in Wagner and the Volsungs: Icelandic
Sources of Der Ring Des Nibelungen that "the Poetic and Prose Eddas mention two
magic rings, wrought by dwarves. One is the gold ring Draupnir (SnE S35, cf
SnE S49)...The other is which Loki takes from the dwarf Andvari(SnE S39, cf
R.4.1)...In both cases, the power of the ring is solely that it can more
wealth. There is no mention of foreswearing love for wealth, which is
Wagner's own idea, and indeed a common motif in Romantic literature"
(134).