Gemini is a Latin word meaning "twins," used as a name for the third sign of the zodiac and the constellation representing the twin brothers Castor and Pollux in Greek mythology. As a personal given name, Gemini is rare but has been adopted in modern times, particularly in English-speaking countries, often reflecting astrological interest or a connection to the constellation's symbolism of duality. The etymology traces back to Latin geminus ("twin"), which itself is a calque of Ancient Greek Δίδυμοι (Dídumoi), meaning "twins." This Greek term was a calque of Akkadian māšu, ultimately from Sumerian mulMAŠ.TAB.BA, referring to the Divine Twins (Lugal-irra and Meslamta-ea) in Mesopotamian star lore. Thus, the name has deep roots in ancient astronomy and mythology, spanning multiple cultures. Cultural and Astrological Significance The constellation Gemini is identified with Castor and Pollux, the twin sons of Leda in Greek myth. Their names form the brightest stars of the constellation—Castor and Pollux. Castor's name may mean "to excel" or "beaver," while Pollux's Latin name derives from Greek Polydeukes, "very sweet." Though not traditionally a human name, Gemini has seen occasional use, especially after the 20th century, likely due to astrological trends. In popular culture, it appears in variable contexts, such as the NASA Gemini space program, which embraced the twin motif. Usage remains uncommon, and Gemini is not tied to any specific cultural origin; its principal bearers are mostly mythic or symbolic.