Caio vs Kay

Baby Name Comparison — 2026

Caio

Boy #3,730 Most Popular 3 Syllables

"to rejoice, to be glad"

Origin: Latin

Brazilian Portuguese Italian Roman

✓ All Clear

Boy #6,417 Most Popular 1 Syllable

"rejoice; pure"

Origin: Latin

English American Welsh

✓ All Clear

Caio Rank #3,730

Kay Rank #6,417

Caio is more popular, ranked #3730 vs #6417 for Kay.

Is Caio or Kay more popular?

Caio is more popular, ranked #3730 compared to Kay at #6417 in the United States.

What do Caio and Kay mean?

Caio means "to rejoice, to be glad" (Latin origin). Kay means "rejoice; pure" (Latin origin).

Are Caio and Kay boy or girl names?

Caio is primarily a boy name. Kay is primarily a boy name.