Kai vs Theo

Baby Name Comparison — 2026

Kai

Boy #76 Most Popular 1 Syllable

"sea"

Origin: Hawaiian

Hawaiian Scandinavian Japanese American Chinese

✓ All Clear

Boy #80 Most Popular 2 Syllables

"gift of God"

Origin: Greek (theodoros)

English Greek French German American

✓ All Clear

Kai Rank #76

Theo Rank #80

Kai is more popular, ranked #76 vs #80 for Theo.

Is Kai or Theo more popular?

Kai is more popular, ranked #76 compared to Theo at #80 in the United States.

What do Kai and Theo mean?

Kai means "sea" (Hawaiian origin). Theo means "gift of God" (Greek (theodoros) origin).

Are Kai and Theo boy or girl names?

Kai is primarily a boy name. Theo is primarily a boy name.