Castor - name meaning and origin

The boy's name Castor \c(a)-stor, cas-tor\ is of Greek origin, and its meaning is "beaver". In classical myth, along with Pollux, one of the heavenly twins immortalized in the constellation Gemini. They were considerd the patron gods of seafarers, appearing to them in Saint Elmo's fire.

Castor has 3 variant forms: Caster, Castorio and Kastor.

For more information, see also the related name Pollux.

Baby names that sound like Castor are Coster and Kester.

Castor is a very rare male first name and a very popular surname (source: 1990 U.S. Census). Displayed below is the baby name popularity trend for the boy's name Castor. Compare Castor with related baby names.