He is the namesake of the Eddic poem Þrymskviða, in which he stole Thor's hammer Mjǫlnir, and the same tale is told in Þrymlur.
[1][2] Three figures named Þrymr, including a king and a jötunn, are mentioned in Hversu Noregr byggðist.
Through Loki, Þrymr conveys his demand for the goddess Freyja's hand in marriage as the price for returning Mjǫlnir, which he has buried eight leagues under the ground.
When Loki flies to Jǫtunheimar using Freyja's feather cloak, he finds Þrymr sitting on a mound, twisting gold leashes for his dogs, and primping his horses' manes.
Three figures named Þrymr are mentioned in Hversu Noregr byggðist, which recounts the story of the early settlement of Norway.