EURY′ANAX (Εὐρυάναξ), a Spartan of the royal house of the Agids. He was the son of Dorieus, and was one of the commanders of the Lacedaemonians at the battle of Plataeae, B. C. 479. (Herod, ix. 10, 53, 55.) [See Dorieus, vol. i. p. 1067, a.] [C.P. M.]