Kastor / Castor

Kastor is the Latinized form of the Greek name Kastor (Κάστωρ). In Greek mythology, Castor was one of the Dioscuri, twin brothers (the other being Pollux) born to Leda. They were revered as patrons of sailors and protectors of travelers. The etymology of the name is often linked to the Greek word 'kastor' (κάστωρ), meaning 'beaver', possibly due to the animal's industrious nature or its valuable musk.

The name has been used since antiquity, primarily in Greek and Roman cultures. Its mythological association with the constellation Gemini (representing the twins Castor and Pollux) has given it a lasting presence in astronomical and astrological contexts. While not as common as some other classical names, it has maintained a consistent, albeit niche, usage over centuries.