Castor
A boys’ name of Greek origin, meaning beaver or the star Castor in Gemini.
Babies a year
14
the US, 2017
Rarity
Very rare
among names in use
US popularity
—
outside the top 1000
UK popularity
—
outside the ONS list
Castor by the numbers
Castor was given to 14 American babies in 2017, the most recent full year we hold.
Its American peak was 29 babies in 2016, making it a 2010s name.
Spelled almost the same
Other names in the records within a letter or two of Castor. Close spellings are not always related names, but they are usually worth seeing together.
Sounds like Castor
Names that are said the same way as Castor, however they are written. Sounding alike does not mean they share a history.
- Kastorto shine; a form of Castor5 in the US (2017)
Other names that mean a star
Like Castor, each of these has a star in its meaning. Different names, different histories, the same idea.
- Novanew; a brightening star650 in England and Wales (2025)
- Orionhunter; name of constellation and mythological figure1,047 in the US (2017)
- Ariesthe ram; zodiac constellation260 in the US (2017)
- Dhruvpole star, steadfast, immovable49 in England and Wales (2025)
- Tariqmorning star or one who knocks36 in England and Wales (2025)
- Arabrings rain; the eagle constellation78 in the US (2017)
Names about as common as Castor
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