Favonius can refer to:
Favonius (wind god), one of the Anemoi; the west wind in Roman mythology Favonius (butterfly), a genus of butterflies Favonius (horse), winner of the 1871 Epsom Derby
See also Favonia gens, a family (gens) of Ancient Rome Knights of Favonius (), an organization from the 2020 game Genshin Impact