In Norse mythology, Sköll (Old Norse: Skǫll, “Treachery” or “Mockery”) is a wolf that chases the Sun (personified as a goddess, Sól). Hati Hróðvitnisson chases the Moon (personified, see Máni).

According to Rudolf Simek, it is possible that Sköll is another name for Fenrir, and, if so, “there could be a nature-mythological interpretation in the case of Sköll and Hati (who pursues the moon). Such an interpretation suggests the wolves may be intended to describe the phenomenon of parhelions or sundogs, as these are called ‘sun-wolf’ in Scandinavian languages (Norwegian solulv, Swedish solvarg)