Kai vs Callister

Baby Name Comparison — 2026

Kai

Boy #76 Most Popular 1 Syllable

"sea"

Origin: Hawaiian

Hawaiian Scandinavian Japanese American Chinese

✓ All Clear

Boy #43,579 Most Popular 3 Syllables

"defender of men"

Origin: Greek via Gaelic

Scottish Manx Irish

✓ All Clear

Kai Rank #76

Callister Rank #43,579

Kai is more popular, ranked #76 vs #43579 for Callister.

Is Kai or Callister more popular?

Kai is more popular, ranked #76 compared to Callister at #43579 in the United States.

What do Kai and Callister mean?

Kai means "sea" (Hawaiian origin). Callister means "defender of men" (Greek via Gaelic origin).

Are Kai and Callister boy or girl names?

Kai is primarily a boy name. Callister is primarily a boy name.