ADRIA, or HADRIA, (anc. geog.) the name of two towns in Italy. One in the country of the Veneti, on the river Tartarus, between the Padus and the Æthius, called Atria by Pliny and Ptolemy, but Adrias by Strabo. Another on the river Vomanus, in the territory of the Piceni, (to which Antonine's Itinerary from Rome is directed,) the country of the ancestors of the emperor Adrian. From which of these the Adriatic sea is denominated, is matter of doubt. A third opinion is, that it is so called from Adrias the son of Joan, of Italian origin; (Eustathius in Dionysium.)