Xuthus, a legendary hero
- father of Ion: Hdt. 7.94, Hdt. 8.44, Paus. 1.31.3
- son of Hellen by a nymph Orseis, father of Achaeus and Ion: Apollod. 1.7.3
- son of Hellen, flees from Thessaly to Athens: Paus. 7.1.2
- father of Diomede: Apollod. 1.9.2
- husband of Creusa: Apollod. 3.15.1
- marries daughter of Erechtheus: Paus. 7.1.2
- settles in Aegialus: Paus. 7.1.2 ff.