Billaeus

== Latin == === Alternative forms === Billis === Etymology === From Ancient Greek Βιλλαῖος (Billaîos). === Pronunciation === (Classical Latin) IPA(key): [bɪlˈlae̯.ʊs] (modern Italianate Ecclesiastical) IPA(key): [bilˈlɛː.us] === Proper noun === Billaeus m sg (genitive Billaeī); second declension A river of Bithynia, now the Filyos River ==== Declension ==== Second-declension noun, singular only. === References === “Billaeus”, in William Smith, editor (1854, 1857), A Dictionary of Greek and Roman Geography, volume 1 & 2, London: Walton and Maberly