One of the principals in the war of the Jews against the Romans in the year 66 of the common era, and a partizan of the leader of the Zealots, Eleazar b. Simeon. He was of noble descent (Josephus, "B. J." 5:1, § 2), and may be identical with Simeon b. Arinos, who also is mentioned in connection with Eleazar (ib. 6, § 1), and thus with Simeon b. Ari, to whose bravery Josephus alludes (ib. 6:1, § 8; 2, § 6).