Zephyrus, pronounced ZEF-uh-rus (/ˈzɛfərəs/), is a masculine given name of ancient Greek provenance, tracing etymologically to the Hellenic term Ζέφυρος (Zéphuros), denoting the west wind deity in classical mythology and subsequently paralleled by the Roman Favonius. In onomastic and phonological terms, Zephyrus comprises three syllables with initial stress, featuring a voiced labiodental fricative, an open-mid front vowel, and a liquid consonant that combine to produce a measured sonority. Demographic data within the United States over the past fourteen years indicate its consistent rarity—annual occurrences ranging from five to thirteen and ranking firmly outside the top 900—underscoring its appeal to parents seeking a name characterized by both intellectual gravitas and elemental precision.