In the Poetic Edda poem Grímnismál, Odin uses the name Grímnir while disguised before King Geirröth.
The name Grímnir is connected with disguise or concealment, fitting Odin’s frequent literary role as a wandering stranger. In the poem’s frame story, Odin visits the court of King Geirröth but is captured and tortured after being accused of hostile magic. He refuses to identify himself at first and speaks while suffering between fires.
A young prince eventually brings him water, and Odin then reveals his identity and recounts extensive mythological knowledge. His speech describes divine halls, the world tree Yggdrasill, rivers, animals, and the geography of the gods’ world.
Grímnismál therefore combines a courtly frame tale with a catalogue of cosmological information. Grímnir is not another separate god: it is an epithet or assumed identity of Odin in this episode. The poem belongs to the group of mythological poems preserved in the Poetic Edda.