Kai vs Declan

Baby Name Comparison — 2026

Kai

Boy #76 Most Popular 1 Syllable

"sea"

Origin: Hawaiian

Hawaiian Scandinavian Japanese American Chinese

✓ All Clear

Boy #131 Most Popular 2 Syllables

"man of prayer"

Origin: Irish Gaelic

Irish English American

✓ All Clear

Kai Rank #76

Declan Rank #131

Kai is more popular, ranked #76 vs #131 for Declan.

Is Kai or Declan more popular?

Kai is more popular, ranked #76 compared to Declan at #131 in the United States.

What do Kai and Declan mean?

Kai means "sea" (Hawaiian origin). Declan means "man of prayer" (Irish Gaelic origin).

Are Kai and Declan boy or girl names?

Kai is primarily a boy name. Declan is primarily a boy name.