Caius

Caius: name meaning, origin & popularity

Meaning: “rejoice”
Origin: Latin
Say it: KYE-əs · 2 syllables
Used for: Boys

Ancient Roman name, usually treated as a variant of Gaius. The traditional explanation links it with Latin gaudere, 'to rejoice,' though the exact ancient derivation is not fully certain.

Names meaning joy Classic names Literary names

How popular is Caius?

202462.0 per million US babies

Drag the line or the slider to read any year. Values are per million US births recorded by Social Security. Records before about 1937 undercount births, so early peaks can look taller than they were.

Compare with another name

Babies named Caius in 2024205

2024 rank#1,062 boys

Peak year2024

Total US babies since 18802,074

Caius is rising: use over the last five years is 2.1× what it was a decade earlier.

Names like Caius

Variants, related forms and names with the same roots.

Kaiusrejoice · Latin
Lucasfrom Lucania · Latin
Leolion · Latin
Julianyouthful, downy-bearded · Latin
Anthonyof the Antonius family · Latin
RomanRoman, from Rome · Latin
Bennettblessed · Latin
Adrianfrom Hadria · Latin

Caius questions

What does the name Caius mean?

Caius means "rejoice". It comes from Latin. Ancient Roman name, usually treated as a variant of Gaius. The traditional explanation links it with Latin gaudere, 'to rejoice,' though the exact ancient derivation is not fully certain.

Is Caius a boy or girl name?

Caius is mainly a boy's name in US records (100% of uses since 1880).

How popular is Caius?

205 US babies were named Caius in 2024. Its peak year was 2024.

How do you pronounce Caius?

Caius is usually pronounced KYE-əs.

Birth counts: US Social Security Administration national data, 1880–2024 (names given to 5+ babies of a sex in a year). How we write meanings.