Ĕleuthĕrĭus, i, m., = Ἐλευθέριος (Liberator),
I the surname of a god : Liber, Arn. 6, p. 207.
II —Hence, Ĕleuthĕrĭa , ōrum, n., the festival of Jupiter Eleutherius , feast of liberty , celebrated in honor of the victory at Plataea, Plaut. Pers. 1, 1, 29.