Thor is associated with the planet Jupiter in Germanic paganism (Germanic mythology).
In Norse mythology, largely recorded in Iceland from traditional material stemming from Scandinavia, numerous tales and information about Thor are provided. In these sources, Thor bears at least fifteen names, is the husband of the golden-haired goddess Sif, is the lover of the jötunn Járnsaxa, and is generally described as fierce eyed, red haired and red bearded. With Sif, Thor fathered the goddess (and possible Valkyrie) Þrúðr; with Járnsaxa, he fathered Móði and Magni (Magni); with a mother whose name is not recorded, he fathered Móði and Magni (Móði), and he is the stepfather of the god Ullr. By way of Odin, Thor has numerous brothers, including Baldr. Thor has two servants, Þjálfi and Röskva Þjálfi and Röskva, rides in a cart or chariot pulled by two goats, Tanngrisnir and Tanngnjóstr Tanngrisn and Tanngnjóstr]] (that he eats and resurrects), and is ascribed three dwellings (Bilskirnir, Þrúðheimr, and Þrúðvangr). Thor wields the mountain-crushing hammer, Mjölnir, wears the belt Megingjörð and the iron gloves Járngreipr], and owns the staff Gríðarvölr. Thor's exploits, including his relentless slaughter of his foes and fierce battles with the monstrous serpent Jörmungandr—and their foretold mutual deaths during the events of Ragnaröko—are recorded throughout sources for Norse mythology.
Old Norse Þórr, Old English ðunor, Old High German Donar, Old Saxon thunar, and Old Frisian thuner are cognates within the Germanic language branch, descending from the Proto-Germanic masculine noun þunraz 'thunder'.
- Falk, Michael (1999). "Astronomical Names for the Days of the Week". Journal of the Royal Astronomical Society of Canada 93: 122–33. doi:10.1016/j.newast.2003.07.002.
- On the red beard and the use of "Redbeard" as an epithet for Thor, see Hilda Ellis Davidson (H.R. Ellis Davidson), Gods and Myths of Northern Europe, 1964, repr. Harmondsworth, Middlesex: Penguin, 1990, ISBN 0-14-013627-4, p. 85, citing the Óláfs saga Tryggvasonar en mesta (Saga of Olaf Tryggvason) in Flateyjarbók, Saga of Erik the Red, and Flóamanna saga. The Prologue to the Prose Edda says ambiguously that "His hair is more beautiful than gold."
- Orel, Vladimir (2003). A Handbook of Germanic Etymology. Brill Publishers. ISBN 9004128751.