Hvergelmir in the context of Eikþyrnir

Yggdrasil (from Old Norse Yggdrasill) is an immense and central sacred tree in Norse cosmology. Around it exists all else, including the Nine Worlds.

Yggdrasil is attested in the Poetic Edda compiled in the 13th century from earlier traditional sources, and in the Prose Edda compiled in the 13th century by Snorri Sturluson. In both sources, Yggdrasil is an immense ash tree that is central to the cosmos and considered very holy. The gods go to Yggdrasil daily to assemble at their traditional governing assemblies. The branches of Yggdrasil extend far into the heavens, and the tree is supported by three roots that extend far away into other locations; one to the well Urðarbrunnr in the heavens, one to the spring Hvergelmir, and another to the well Mímisbrunnr. Creatures live within Yggdrasil, including the dragon Níðhöggr, the squirrel Ratatoskr, the hawk Veðrfölnir, and the stags Dáinn, Dvalinn, Duneyrr and Duraþrór.

In Norse mythology, Mímisbrunnr (Old Norse "Mímir's wellspring") is a spring or well associated with the being Mímir, located beneath the world tree Yggdrasil. Mímisbrunnr is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written in the 13th century by Snorri Sturluson. The wellspring is located beneath one of three roots of the world tree Yggdrasil, a root that passes into the Jötunheimr where the primordial plane of Ginnungagap once existed. In addition, the Prose Edda relates that the water of the wellspring contains much wisdom, and that Odin sacrificed one of his eyes to the wellspring in exchange for a drink. In the Prose Edda, Mímisbrunnr is mentioned as one of three wellsprings existing beneath three roots of Yggdrasil, the other two being Hvergelmir, located beneath a root in Niflheim, and Urðarbrunnr.

Urðarbrunnr (Old Norse "Wellspring of Urðr"; either referring to a Germanic concept of fate—urðr—or the norn named Urðr) is a spring or well in Norse mythology. Urðarbrunnr is attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written in the 13th century by Snorri Sturluson. In both sources, the wellspring lies beneath the world tree Yggdrasil, and is associated with a trio of norns (Urðr, Verðandi, and Skuld). In the Prose Edda, Urðarbrunnr is cited as one of three wellsprings existing beneath three roots of Yggdrasil that reach into three distant, different lands; the other two wellsprings being Hvergelmir, located beneath a root in Niflheim, and Mímisbrunnr, located beneath a root near the home of the frost jötnar. Scholarly theory and speculation surrounds the wellspring.