Caius vs Duncan

Baby Name Comparison — 2026

Caius

Boy #1,063 Most Popular 2 Syllables

"to rejoice, joyful"

Origin: Latin

Roman British European American

✓ All Clear

Boy #1,104 Most Popular 2 Syllables

"dark warrior"

Origin: Scottish Gaelic

Scottish Irish British American

✓ All Clear

Caius Rank #1,063

Duncan Rank #1,104

Caius is more popular, ranked #1063 vs #1104 for Duncan.

Is Caius or Duncan more popular?

Caius is more popular, ranked #1063 compared to Duncan at #1104 in the United States.

What do Caius and Duncan mean?

Caius means "to rejoice, joyful" (Latin origin). Duncan means "dark warrior" (Scottish Gaelic origin).

Are Caius and Duncan boy or girl names?

Caius is primarily a boy name. Duncan is primarily a boy name.