Kai vs Hayden

Baby Name Comparison — 2026

Kai

Boy #76 Most Popular 1 Syllable

"sea"

Origin: Hawaiian

Hawaiian Scandinavian Japanese American Chinese

✓ All Clear

Boy #154 Most Popular 2 Syllables

"hay valley, hedged valley"

Origin: Old English

American English

✓ All Clear

Kai Rank #76

Hayden Rank #154

Kai is more popular, ranked #76 vs #154 for Hayden.

Is Kai or Hayden more popular?

Kai is more popular, ranked #76 compared to Hayden at #154 in the United States.

What do Kai and Hayden mean?

Kai means "sea" (Hawaiian origin). Hayden means "hay valley, hedged valley" (Old English origin).

Are Kai and Hayden boy or girl names?

Kai is primarily a boy name. Hayden is primarily a boy name.