Knox vs Kai

Baby Name Comparison — 2026

Knox

Boy #209 Most Popular 1 Syllable

"round hill"

Origin: Old English/Scottish

American Scottish English

✓ All Clear

Boy #76 Most Popular 1 Syllable

"sea"

Origin: Hawaiian

Hawaiian Scandinavian Japanese American Chinese

✓ All Clear

Knox Rank #209

Kai Rank #76

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

Is Knox or Kai more popular?

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

What do Knox and Kai mean?

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

Are Knox and Kai boy or girl names?

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