Castor as a Baby Name. Meaning and Origin of Castor

What is the meaning of the name Castor ?

The baby name Castor is a Male name , 2 syllables long and is pronounced /ˈkæs.tər/ (KAS-ter).

Castor is Greek in Origin.

Castor is the Latinized form of Greek Kástōr (Κάστωρ), a personal name that also matches the Greek and Latin word for “beaver,” a term of uncertain, likely pre‑Greek origin. As a given name it is best known from myth: Castor, twin of Pollux (Polydeukes), one of the Dioscuri, patrons of sailors and horsemen, whose name is borne by the bright star Castor in Gemini. The meaning is typically given as “beaver,” with cultural associations of protection, skill, and seafaring derived from the mythic bearer.

The name circulated widely in the Hellenistic and Roman worlds and persisted through Christian usage via saints such as Castor of Karden and Castor of Apt (4th century). Variants and related forms include Greek Kastor, Italian Castore, Spanish and Portuguese Cástor, and French Castor; a rare feminine form Castora is attested. Modern use is uncommon but appeals for its classical and celestial resonance, with Cas a natural short form.