Rian vs Caius

Baby Name Comparison — 2026

Rian

Boy #1,263 Most Popular 2 Syllables

"little king"

Origin: Irish Gaelic

Irish Celtic British

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Boy #1,063 Most Popular 2 Syllables

"to rejoice, joyful"

Origin: Latin

Roman British European American

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Rian Rank #1,263

Caius Rank #1,063

Caius is more popular, ranked #1063 vs #1263 for Rian.

Is Rian or Caius more popular?

Caius is more popular, ranked #1063 compared to Rian at #1263 in the United States.

What do Rian and Caius mean?

Rian means "little king" (Irish Gaelic origin). Caius means "to rejoice, joyful" (Latin origin).

Are Rian and Caius boy or girl names?

Rian is primarily a boy name. Caius is primarily a boy name.