Kai vs Alex

Baby Name Comparison — 2026

Kai

Boy #76 Most Popular 1 Syllable

"sea"

Origin: Hawaiian

Hawaiian Scandinavian Japanese American Chinese

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Boy #205 Most Popular 2 Syllables

"defender of men"

Origin: Greek

English Greek Spanish Russian French

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Kai Rank #76

Alex Rank #205

Kai is more popular, ranked #76 vs #205 for Alex.

Is Kai or Alex more popular?

Kai is more popular, ranked #76 compared to Alex at #205 in the United States.

What do Kai and Alex mean?

Kai means "sea" (Hawaiian origin). Alex means "defender of men" (Greek origin).

Are Kai and Alex boy or girl names?

Kai is primarily a boy name. Alex is primarily a boy name.