Greek God Starting with W: Zephyr, God of the West Wind

There is no major Greek god whose name starts with W in English—the Greek alphabet has no "W" (digamma Ϝ fell out of use). The closest is:

Zephyr (Ζέφυρος)

• Domain: God of the west wind; harbinger of spring.
• Parents: Astraeus (dusk) & Eos (dawn) — or sometimes Aeolus (wind keeper).
• Consorts: Chloris (Flora, goddess of flowers), Iris (rainbow), Podarge (harpy, mother of Achilles' horses).
• Myths: Loved Hyacinthus (killed by discus jealousy); abducted Chloris; fathered Balius & Xanthus (immortal horses).
• Roman Equivalent: Favonius.

Other Wind Gods (Anemoi)

• Boreas — North wind (winter).
• Notus — South wind (summer storms).
• Eurus — East wind (autumn).

Zephyr is the gentlest, most benevolent—associated with renewal, fertility, and safe voyages.