Gender: Male Meaning of Caius: "rejoice" Origin of Caius: Latin

Caius Origin and Meaning

The name Caius is a boy's name of Latin origin meaning "rejoice".

Caius is classical and serious but also has a simple, joyful quality. There was a third century pope named Caius, as well as an early Christian writer, several Shakespearean characters, and a Twilight vampire. We would pronounce the name to rhyme with eye-us though at Cambridge University in England, where it's the name of a college, it's pronounced keys. Caius is currently Number 164 on Nameberry.

Nickname Cai is a definite asset.

16 names similar to Caius

These 16 names were selected by our users that were looking for other names like Caius. If you didn't find an alternative name that you like better than Caius, try our name generator. It allows you to go beyond the similarities of a name, which can provide a lot of inspiration!

Find other names based on Caius using our baby name generator.


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Famous People Named Caius

Pop Culture References for the name Caius

Keye, Keys, Keyes, Cai, Kay, Caio, Kaye


fearlessfirefly Says:



daniellexrose Says:


My son is called Caius and we pronounce it "ky-uss". He has just turned 2 years old. A lot of people mispronounce it "Kay-us" and spell it Cauis. It doesn't bother me too much anymore. We call him Cai for short. I love his name regardless of how weird people think it is!

rami Says:


who is it pronounced? is it like Thai yus? this site should a pronunciation feature. it would be awesome

EW314 Says:


I really like Caius. It's one of the few majestic-sounding Latinate names in -us which I can actually see working on a modern boy/man. Cai would fit right in with his classmates.

Michaela Says:


I love this name so much. Cai would be a really cool nickname. It has Christian heritage without being too blatant like Isaiah or Samuel.

otheralix Says:


Kai-us, though Kay-us is just as good. Originally, it was pronounced like Gaius (Cs and Gs were the same), which has two common pronunciations (Guy-us and Gay-us). The "ai" in Latin is pronounced ah-ee and "u" is oo. So, you could say the original is somewhat like Kah-ee-oo-s, which just sounds like an elongated way to get to "kai-us."

cmwillard Says:


What's the pronunciation? im just confused because I've heard it pronounced several ways

indiefendi2 Says:


I love this name but it's starting to sound "callous" to me.