creature
Fenrir
The giant wolf fathered by Loki on Angrboða, raised by the gods, bound with the fetter Gleipnir at the cost of Týr's hand, and fated to swallow Odin at Ragnarök.
Fenrir is the great wolf of Norse myth, the first-named of the three monstrous children that Loki fathered on the giantess Angrboða Gylfaginning 34. Hyndluljóð confirms the parentage in one line: "The wolf did Loki with Angrbotha win" Hyndluljóð 42. His fate is tied to Odin's: the gods know he will kill the father of the gods, and the whole story of Fenrir is the story of their attempt to delay that.
The binding
Snorri tells the story most fully (see The binding of Fenrir). The gods kept the wolf at home, and only Týr dared to feed him. Because he grew so fast and every prophecy said he would destroy them, they decided to bind him. He broke the fetter Lædingr and then the twice-stronger Drómi, which gave rise to sayings for getting out of a tight spot Gylfaginning 34.
Odin then sent Skírnir to have dwarves make Gleipnir, a ribbon "soft and smooth as a silken ribbon" made of impossible things. The wolf, suspicious of a band that looked so weak, agreed only if one of the gods would put a hand in his mouth as a pledge. Týr did. The more the wolf struggled, the tighter the band became: "Then all laughed except Týr: he lost his hand." The gods anchored him to the rocks, propped his jaws open with a sword, and left him there; the slaver from his mouth forms the river Ván. They did not kill him, Snorri says, because they would not defile their sanctuary with his blood Gylfaginning 34.
The poems know the story but do not tell it. The prose introduction of Lokasenna notes that Fenrir bit off Týr's hand Lokasenna, prose 1. In the poem Loki taunts Týr with it, and Týr replies that Loki has lost something too: the wolf, now waiting "In fetters the fall of the gods" Lokasenna 39. Freyr adds that the wolf lies "By the mouth of the river" Lokasenna 41.
At Ragnarök
Völuspá's refrain, "The fetters will burst, and the wolf run free," marks each stage of the end Völuspá 44. In Snorri, Fenrir advances with his lower jaw on the earth and his upper jaw against the sky, fire blazing from his eyes Gylfaginning 51. He swallows Odin Vafþrúðnismál 53, and Odin's son Víðarr avenges him at once.
Then comes Sigfather's mighty son,Vithar, to fight with the foaming wolf;In the giant's son does he thrust his swordFull to the heart: his father is avenged.Völuspá 54
Vafþrúðnismál instead has Víðarr tear the wolf's jaws apart Vafþrúðnismál 53, and Snorri combines the two: a foot on the lower jaw, a hand on the upper Gylfaginning 51.
The wolf and the sun
Fenrir's name also attaches to the wolves that hunt the sun and moon. Vafþrúðnismál says Fenrir himself will snatch the sun Vafþrúðnismál 46-47; Snorri gives that task to the wolf Sköll, and calls the Ironwood brood that produces such wolves "Fenrir's brethren" Gylfaginning 12. Grímnismál calls the moon-chasing Hati "the son of Hrothvitnir" Grímnismál 39, a name Týr uses for Fenrir in Lokasenna Lokasenna 39. See Sköll and Hati.
In the sources
Quoted from the hosted translations; each line is checked against the text when the site is built. Select a reference to read it in context.
The Wolf the Æsir brought up at home, and Týr alone dared go to him to give him meat.
Ill fares the wolf who shall ever await In fetters the fall of the gods.
The fetters will burst, and the wolf run free
The wolf shall fell the father of men, And this shall Vithar avenge
Fenris-Wolf shall advance with gaping mouth, and his lower jaw shall be against the earth, but the upper against heaven
Where the sources disagree or fall silent
- Whether Hati, called 'the son of Hrothvitnir' (Grímnismál 39), is Fenrir's son depends on taking Hróðvitnir as Fenrir's by-name, which Lokasenna 39 suggests but no source states outright.
- Völuspá says Víðarr killed the wolf with a sword to the heart (Völuspá 54); Vafþrúðnismál says he tore its jaws apart (Vafþrúðnismál 53).
In modern culture
Not from the medieval sources.
Fenrir is a common figure in fantasy and games, and the name of J. K. Rowling's werewolf Fenrir Greyback in the Harry Potter books.