/ˈfau̯no/
OriginBorrowed from New Latin fauna, from Latin Fauna, sister of Faunus (“Roman god of forests, plains and fields”). Compare French faune, German Fauna, Russian фа́уна (fáuna), Italian fauna.
Formsfaŭnon(accusative, singular) · faŭnoj(plural) · faŭnojn(accusative, plural)
Source: Wiktionary