In ancient Roman religion and myth, Faunus was the horned god of the forest, plains and fields; when he made cattle fertile he was called Inuus. He came to be equated in literature with the Greek god Pan.
Faunus was one of the oldest Roman deities, known as the di indigetes. According to the epic poet Virgil, he was a legendary king of the Latins who came with his people from Arcadia. His shade was consulted as a god of prophecy under the name of Fatuus, with oracles in the sacred grove of Tibur, around the well Albunea, and on the Aventine Hill in ancient Rome itself.
Marcus Terentius Varro asserted that the oracular responses were given in Saturnian verse. Faunus revealed the future in dreams and voices that were communicated to those who came to sleep in his precincts, lying on the fleeces of sacrificed lambs. W. Warde Fowler suggested that Faunus is identical with Favonius, one of the Roman wind gods (compare the Anemoi).
Faunus is the Latin outcome of a PIE *dhau-no- meaning "the strangler" and denotes the wolf. According to D. Briquel ("Le problème des Dauniens" in MEFRA 1974) it is likely that the Luceres, one of the three tribes of Rome, were Daunians from Ardea, as well as the characters of the Aeneis Mezentius, Messapus and Metabus, who show a Daunian origin. A. Pasqualini agrees on the presence of a Daunian connection in the towns of Latium claiming a Diomedean descent. Moreover, it would seem that there is a sizable presence of Daunians in Latium and Campania (Liternum, Nola). Festus 106 L records a king Lucerus who helped Romulus against Titus Tatius. Moreover, Oscan epithet Leucesius (present also in the Carmen Saliare) and Lucetius (Servius Aen. IX 570 "a luce") should be interpreted as related to the Luceres. He also lists the Leucaria mother of Romos (Dionysius of Halicarnassus I 72), Jupiter Lucetius, toponyms Leucasia /Leucaria (Pliny III 8 (13) 85; Dion. Hal. I 53) near Paestum, the ethnonym Lucani. Though Briquel is apparently unaware that the etymology of both "Luceres", Lucera, Leucaria, Lucani and Dauni is from a word meaning wolf and therefore different from that of Leucesius/ Lucetius, i.e. from IE from *luq (wolf), not from *leuk light: compare also Hirpini and Dauni. Daunos according to Walde Hoffmann is from IE root *dhau to strangle, meaning the strangler, epithet of the wolf: cfr. Greek thaunos, thērion Hes., Phrygian dáos, lykos Hes., Latin F(f)aunus. According to Alessio Latins and Umbrians both did not name the wolf because of a religious taboo, thence their use of loanwords such as lupus in Latin (which is Sabine, instead of the expected *luquos) and the Umbrians hirpos (cfr. Hirpini) originally male goat instead of expected *lupos, whence also herpex for hirpex tool in the shape wolf teeth.