Castor
c(a)-stor,
cas-tor
US Popularity:10006
Origin:Greek
Meaning:beaver
With the slightly unique meaning of “beaver,” Castor is a boy's name of Greek origin. In classical Greek myth, Castor, along with Pollux, was one of the heavenly twins immortalized in the constellation Gemini. They were considered the patron gods of seafarers, appearing to them in Saint Elmo's fire. In ancient times, many sailors would offer up their prayers in the hope of favorable winds. If you have a connection with the sea or like a name with a good story, then Castor is an excellent choice for baby.
How Popular Is The Name Castor?
U.S. Births
Overall:Castor is currently #10006 in U.S. births
Boy:Castor is currently #4734 in U.S. births
Yearly Ranking Change:
Year:
2025
#4734
in 2025
+ 2153
from 2024
Sources
100,000+ Baby Names by Bruce Lansky, pg. 362
Name Doctor, Castor
Britannica, Dioscuri Greco-Roman deities, February 2024
Behind the Name, Castor, May 2020
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