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Thor

Germanic god associated with thunder

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Painting "Donar-Thor" by the German painter Max Friedrich Koch (1859 - 1930), painted about 1905
Max Koch · Public domain

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Through Recorded history, Roman Empire and Iceland

Thor is a prominently mentioned god throughout the recorded history of the Germanic peoples, from the Roman occupation of regions of Germania, to the Germanic expansions of the Migration Period, to his high popularity during the Viking Age, when, in the face of the process of the Christianization of Scandinavia, emblems of his hammer, Mjölnir, were worn and Norse pagan personal names containing the name of the god bear witness to his popularity.

Narratives featuring Thor are most prominently attested in Old Norse, where Thor appears throughout Norse mythology. In stories recorded in medieval Iceland, Thor bears at least fifteen names, is the husband of the golden-haired goddess Sif and the lover of the jötunn Járnsaxa. With Sif, Thor fathered the goddess (and possible valkyrie) Þrúðr; with Járnsaxa, he fathered Magni; with a mother whose name is not recorded, he fathered Móði, and he is the stepfather of the god Ullr. Thor is the son of Odin and Jörð, by way of his father Odin, he has numerous brothers, including Baldr. Thor has two servants, Þjálfi and Röskva, rides in a cart or chariot pulled by two goats, Tanngrisnir and Tanngnjóstr (whom he eats and resurrects), and is ascribed three dwellings (Bilskirnir, Þrúðheimr, and Þrúðvangr). Thor wields the 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 Ragnarök—are recorded throughout sources for Norse mythology.

Into the modern period, Thor continued to be acknowledged in folklore throughout Germanic-speaking Europe. Thor is frequently referred to in place names, the day of the week Thursday bears his name (modern English Thursday derives from Old English thunresdaeġ, 'Thunor's day'), and names stemming from the pagan period containing his own continue to be used today, particularly in Scandinavia. Thor has inspired numerous works of art and references to Thor appear in modern popular culture. As with other Germanic deities, veneration of Thor is revived in the modern period in Heathenry.

Name

The name Thor is derived from Norse mythology. Its medieval Germanic cognates (linguistic siblings from a common origin) are Donar (Old High German), Þunor (Old English), Thuner (Old Frisian), Thunar (Old Saxon), and Þórr (Old Norse), the latter of which inspired the modern English form Thor.

Etymology

Although Old Norse Þórr is monosyllabic, it comes from an earlier Proto-Norse two-syllable form which can be reconstructed as *Þonarr (from *Þunaraz) and/or as *Þunurr (from *Þunuraz), evidenced by the poems Hymiskviða and Þórsdrápa, and by modern Elfdalian tųosdag 'Thursday', through the common Old Norse development of the sequence -unr- to -ór-.

All Germanic forms of Thor's name descend from Proto-Germanic, but its exact early form remains debated. One proposed reconstruction, *Þunuraz is suggested by Elfdalian tųosdag ('Thursday') and by a runic inscription dated to around 700 from Hallbjäns (in Sundre, Gotland), which contains the sequence þunurþurus. Another possibility, *Þunaraz is attractive because it corresponds to the ancient Celtic theonym Taranus, itself arising by metathesis (switch of sounds) of an earlier *Tonaros, attested in the dative tanaro and the Gaulish river name Tanarus. A third proposal, *Þunraz, is appealing in that it clearly containing the sequence -unr-, needed to account for the later Old Norse Þórr, although it no longer perfectly aligns with the Celtic *Tonaros. According to John T. Koch, however, both Germanic *Þunraz and Celtic *Tonaros can still be derived from a common from *ton(a)ros ~ *tn̥ros.

These Proto-Germanic forms can probably further be traced back to the common Proto-Indo-European root for 'thunder' *(s)tenh₂-, also attested in the Latin epithet Tonans (attached to Jupiter) and the Vedic stanáyati ('thunders'). Scholar Peter Jackson argues that those theonyms may have emerged as the result of the fossilization of an original epithet (or epiclesis, i.e. invocational name) of the Proto-Indo-European thunder-god *Perkwunos, since the Vedic weather-god Parjanya is also called stanayitnú- ('Thunderer').

According to Koch, the potential correspondence between the thunder-gods *Þunraz and *Tonaros is notable in the context of early Celtic–Germanic linguistic contacts, especially when added to other inherited terms with thunder attributes, such as *Meldunjaz–*meldo- (from *meldh- 'lightning, hammer of the thunder-god') and *Fergunja–*Fercunyā (from *perkwun-iyā '[wooded] mountains').

Name of the weeks

The English weekday name Thursday comes from Old English Þunresdæg, meaning 'day of Þunor', with influence from Old Norse Þórsdagr. The name is cognate with Old High German Donarestag. All of these terms derive from a Late Proto-Germanic weekday name along the lines of *Þunaresdagaz ('Day of *Þun(a)raz'), a calque of Latin Iovis dies ('Day of Jove'; compare modern Italian giovedì, French jeudi, Spanish jueves). By employing a practice known as interpretatio germanica during the Roman period, ancient Germanic peoples adopted the Latin weekly calendar and replaced the names of Roman gods with their own.

Personal names

Beginning in the Viking Age, personal names containing the theonym Þórr are recorded with great frequency, whereas no examples are known prior to this period. Þórr-based names may have flourished during the Viking Age as a defiant response to attempts at Christianization, similar to the widespread Viking Age practice of wearing Thor's hammer pendants.

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Source and licence. Adapted from the Wikipedia article “Thor” (this version, 2026-08-08) by its contributors, shared under CC BY-SA 4.0. Lablypedia has left out its tables, references and most pictures, and linked it to other Lablypedia articles.