Callister vs Caio

Baby Name Comparison — 2026

Callister

Boy #43,579 Most Popular 3 Syllables

"defender of men"

Origin: Greek via Gaelic

Scottish Manx Irish

✓ All Clear

Boy #3,730 Most Popular 3 Syllables

"to rejoice, to be glad"

Origin: Latin

Brazilian Portuguese Italian Roman

✓ All Clear

Callister Rank #43,579

Caio Rank #3,730

Caio is more popular, ranked #3730 vs #43579 for Callister.

Is Callister or Caio more popular?

Caio is more popular, ranked #3730 compared to Callister at #43579 in the United States.

What do Callister and Caio mean?

Callister means "defender of men" (Greek via Gaelic origin). Caio means "to rejoice, to be glad" (Latin origin).

Are Callister and Caio boy or girl names?

Callister is primarily a boy name. Caio is primarily a boy name.