Of Latin origin; (in the genitive, i.e. Possessive case) of Appius, the name of a Roman -- Appii.
Thayer's Greek Lexicon
Strong's 675: Ἀππιος
Ἀππιος, Ἀππίου, ὁ, Appius, a Roman praenomen; Ἀππίουφόρον Appii Forum (Cicero, ad Att. 2, 10; Horace sat. 1, 5, 3) (R. V. The Market of Appius), the name of a town in Italy, situated 43 Roman miles from Rome on the Appian way — (this road was paved with square ((?) polygonal) stone by the censor Appius Claudius Caecus, , and led through theportaCapena to Capua, and thence as far as Brundisium): Acts 28:15. (Cf. BB. DD.)
Acts 28:15 - N-GMS GRK:ἡμῖν ἄχρι Ἀππίου Φόρου καὶ NAS: as the Market of Appius and Three KJV: us as far as Appii forum, and INT: us as far as Appius market and