), a hero of Locri in Italy, was a son of Astycles or of the river-god Caecinus.
He was famous for his strength and skill in boxing, and delivered the town of Temessa from the evil spirit Polites, to whom a fair maiden was sacrificed every year. Euthymus himself disappeared at an advanced age in the river Caecinus. (Strab. vi. p.255
; Aelian, Ael. VH 8.18
; Eustath. ad Hom. p. 1409
He gained several victories at Olympia (Ol. 74, 76, and 77); and a statue of his at Olympia was the work of Pythagoras. (Paus. 6.6.2