(Ξενάρης), a Spartan, was one of the ephors who came into office in B. C. 421. Being opposed to the truce which had been made with Athens for fifty years, he and his colleague Cleobulus intrigued with the Boeotians and Corinthians to reconstruct the Lacedaemonian league, and to strengthen it by the addition of Argos. If this could have been effected, Sparta would have had nothing to fear from the renewal of war with Athens : but the scheme failed in consequence of the secrecy necessary in its preliminary steps. (Thuc. 5.36_38.) Xenares, a Lacedaemonian, son of Cnidis, is mentioned as commander of the colony at the Trachinian Heracleia in B. C. 420, when the colonists were assailed by the forces of several neighboring tribes, and were defeated with great loss, Xenares himself being among the slain. He appears to have been a different person from the ephor of the preceding year. (Thuc. 5.51.)
[E.E]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890