Cai vs Callister

Baby Name Comparison — 2026

Cai

Boy #1,906 Most Popular 1 Syllable

"rejoice, delight"

Origin: Latin via Welsh

Welsh Chinese English

✓ All Clear

Boy #43,579 Most Popular 3 Syllables

"defender of men"

Origin: Greek via Gaelic

Scottish Manx Irish

✓ All Clear

Cai Rank #1,906

Callister Rank #43,579

Cai is more popular, ranked #1906 vs #43579 for Callister.

Is Cai or Callister more popular?

Cai is more popular, ranked #1906 compared to Callister at #43579 in the United States.

What do Cai and Callister mean?

Cai means "rejoice, delight" (Latin via Welsh origin). Callister means "defender of men" (Greek via Gaelic origin).

Are Cai and Callister boy or girl names?

Cai is primarily a boy name. Callister is primarily a boy name.