Duncan vs Caius

Baby Name Comparison — 2026

Duncan

Boy #1,104 Most Popular 2 Syllables

"dark warrior"

Origin: Scottish Gaelic

Scottish Irish British American

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Boy #1,063 Most Popular 2 Syllables

"to rejoice, joyful"

Origin: Latin

Roman British European American

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Duncan Rank #1,104

Caius Rank #1,063

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

Is Duncan or Caius more popular?

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

What do Duncan and Caius mean?

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

Are Duncan and Caius boy or girl names?

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