Gontia (deity)  Gontia () was a Celtic goddess. She was the tutelary deity of the river Günz, near Günzburg in Germany. She is known from an inscription on a Roman-era altar at Günzburg () that reads "Gontiae / sac(rum) / G(aius!) Iulius / Faventianus / |(centurio) leg(ionis) I Ital(icae)", or 'Gaius Julius Faventianus, centurion of the Legio I Italica, (made) this offering to Gontia'. A connection has been proposed with the Belgian city Ghent.