Donar: The Thunderer, Before He Was Thor

Donar (Old Norse Þórr, Old English Þunor) was the thunder god of the continental Germanic peoples – his name means simply "thunder". He was no distant ruler of the sky but the people's protector: the god who with lightning and thunder warded off the giants and all that threatened, and watched over weather, fertility and the peace of the community.

The name: *Þunraz, the Thunderer

The god's name is thunder itself. Proto-Germanic *Þunraz ("thunder") became Donar in the south, Þunor in Old English, Þórr in the north. Behind it lies the Indo-European root *(s)tenh₂- "to thunder" – the same in Latin tonare and English "thunder". The name says it all: this god is the storm cloud, the lightning, the rumble over the fields. He is no distant sky-lord like Tiwaz, but the near, hands-on protector – the god of the farmer and the free man.

The Hercules of the Germani

When the Romans interpreted Germanic belief (interpretatio Romana), they equated Donar with Hercules – the club-swinging hero who slays monsters. Tacitus writes that the Germani sang of Hercules as the bravest of men when going into battle. The comparison fits: club and hammer, strength and protection, the fighter against chaos. On the Lower Rhine this god even appears with his own byname – as Hercules Magusanus, worshipped by the Batavi and Rhenish tribes on numerous votive stones. A piece of the Germanic thunder god, carved into Roman stone, right on our doorstep.

The hammer and the thunderstones

Donar's weapon is the hammer – called Mjölnir in the north. It shatters giants and returns to the hand; at the same time it hallows, blessing marriage, boundary and grave. From the Viking Age we know hundreds of Thor's-hammer amulets in silver, bronze and iron; the mould from Trelleborg cast hammer and cross side by side – the crossover of two worlds of belief in one workpiece. A Danish hammer from Købelev even bears the runic line "this is a hammer". In folk belief the lightning god lived on: prehistoric stone axes were held into modern times to be "thunderstones" the god had hurled from the sky – buried under the threshold for protection.

The Donar oak of Geismar

Donar's sacred tree was the oak – the tree the lightning loves best. The most famous stood at Geismar (today Fritzlar in Hesse). Around 723 the Anglo-Saxon missionary Boniface felled it before the eyes of the Chatti, to prove the old god's impotence. When no thunderbolt struck him, so the legend goes, many were baptised; from the timber a church was built. The account is Christian mission literature – but it proves how firmly the thunder god was anchored in continental belief. To this day place names like Donnersberg in the Palatinate recall him.

Goat, lightning and hallowing

In the north the god rides a wagon drawn by two goats (Tanngrisnir and Tanngnjostr); the rolling of the wagon is the thunder. In the end he hallows with the hammer – and that very gesture appears on real runestones: the stones of Glavendrup, Virring and Sønder Kirkeby bear the formula "May Thor hallow these runes" or "…this monument". The thunder god was not only myth but everyday invocation: protection for stone, grave and kin.

Thursday and what remained

Like no other god, Donar shaped our week: Thursday is literally "Thor's day" (German Donnerstag = Donar's day), formed after the Roman dies Iovis, the day of Jupiter – itself an interpretatio, for Jupiter was Rome's lightning and thunder god. So the Germanic protector still stands in every calendar. The hammer, meanwhile, became the symbol of symbols – worn as a sign of strength, protection and belonging, then as now.

"Of the gods they worship Mercury most … Hercules and Mars they appease with lawful sacrificial animals."Tacitus, Germania 9, after a public-domain translation (Hercules = Donar)

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Wodan, Donar & Ziu · Taranis · Tiwaz · Thor · Germanic Religion.

Sources & literature

Antiquity: Tacitus, Germania 9. Epigraphy: votive stones of Hercules Magusanus (Lower Rhine/Batavi, CIL XIII). Hagiography: Willibald, Life of Boniface (Donar oak 723). Runes: Glavendrup (DR 209), Virring (DR 110), Sønder Kirkeby ("Þórr vígi"). Archaeology: Thor-hammer typology (Staecker 1999); Trelleborg mould; Købelev hammer. Edda: Snorri, Gylfaginning. Scholarship: R. Simek; J. de Vries; RGA. Image: Thor, Johannes Gehrts 1901 (public domain).

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