Gandalf is a fictional character and one of the main protagonists in J. R. R. Tolkien's novels The Hobbit and The Lord of the Rings. He is a wizard, member of the Istari order, as well as leader of the Fellowship of the Ring and the army of the West. In The Lord of the Rings, he is initially known as Gandalf the Grey, but returns from death as Gandalf the White.

Gandalf is a Dvergr (Norse dwarf) in Norse mythology, appearing in the so-called 'Tally of the Dwarves' within the poem Völuspá from the Poetic Edda, as well as in the Prose Edda. The name derives from the Old Norse words gandr (magic staff) and álfr (elf), thus a protective spirit who wields a magical wand.