"Oak-thorny." The hart that nibbles on the branches of Læraðr, the tree which stands by the hall of Herjaföðr (i.e., Odin). The exudation from its horns falls into the well Hvergelmir and feeds various rivers. The hart is attested in Grímnismál:
- Eikthyrnir the hart is called,
- that stands o'er Odin' s hall,
- and bites from Lærad' s branches;
- from his horns fall
- drops into Hvergelmir,
whence all waters rise.
In the Nafnaþulur it is one of the names for hart.
- Grímnismál, 26.
- Gylfaginning, 39.