ἐβόα καὶ βαρβαρικῶς καὶ Ἑλληνικῶς → shouted out both in Persian and Greek, shouted out in the barbarian tongue and in Greek
Celt, Kelt = Κέλτης
Celts, Kelts = Κελτοί, οἱ.
Celtic, Keltic, adj.: Κελτικός.
