In Norse mythology, Angrboða (Old Norse "the one who brings grief" or "she-who-offers-sorrow") is a female jötunn (giantess). In the Poetic Edda, Angrboða is mentioned only in Völuspá hin skamma (found in Hyndluljóð) as the mother of Fenrir by Loki. However, in the Prose Edda book Gylfaginning, she is referred to as a "giantess in Jötunheimr" and said also to be the mother of Fenrir's siblings Jörmungandr (the Midgard Serpent) and Hel. She may be identical with Iárnvidia, 'She of Iron-wood', mentioned in the list of troll-wives in the Prose Edda list nafnaþulur.