Constantine II (Armenian: Կոստանդին Բ), also Kostandin II, (unknown – after February 17, 1129) was the fourth lord of Armenian Cilicia or “Lord of the Mountains” (1129/1130). The Chronique Rimée de la Petite Arménie (“The Rhymed Chronicle of Armenia Minor”) of Vahram of Edessa records that he was the son of Thoros I, lord of Armenian Cilicia. His mother's name is not known. He died a few months after his father's death in the course of a palace intrigue. Vahram of Edessa, the historian tells us that he was cast into prison and poisoned to death.