In Norse mythology, Durinn (also spelled as Durin) is a dwarf mentioned in stanza 10 of the poem Völuspá from the Poetic Edda and reiterated in Gylfaginning from the Prose Edda. He is considered the second dwarf to be created, following the first and most prominent dwarf, Mótsognir.
The Hervarar saga also attests to Durinn's existence, where he is credited with forging the legendary magic sword Tyrfing. In this endeavor, he collaborated with another dwarf named Dvalin. It's worth noting that in some variant texts of the saga, Durinn is referred to as Dulinn.
In modern literature, particularly in the legendarium created by J.R.R. Tolkien, the name Durin is used for several Dwarf kings, including Durin the Deathless, who was the eldest of the Seven Fathers of the Dwarves. Tolkien drew inspiration from Norse mythology and incorporated many elements, including names, into his own fictional world.