Kai vs Knox

Baby Name Comparison — 2026

Kai

Boy #76 Most Popular 1 Syllable

"sea"

Origin: Hawaiian

Hawaiian Scandinavian Japanese American Chinese

✓ All Clear

Boy #209 Most Popular 1 Syllable

"round hill"

Origin: Old English/Scottish

American Scottish English

✓ All Clear

Kai Rank #76

Knox Rank #209

Kai is more popular, ranked #76 vs #209 for Knox.

Is Kai or Knox more popular?

Kai is more popular, ranked #76 compared to Knox at #209 in the United States.

What do Kai and Knox mean?

Kai means "sea" (Hawaiian origin). Knox means "round hill" (Old English/Scottish origin).

Are Kai and Knox boy or girl names?

Kai is primarily a boy name. Knox is primarily a boy name.