Killian vs Callister

Baby Name Comparison — 2026

Killian

Boy #370 Most Popular 3 Syllables

"associated with the church"

Origin: Irish Gaelic

Irish French American English

✓ All Clear

Boy #43,579 Most Popular 3 Syllables

"defender of men"

Origin: Greek via Gaelic

Scottish Manx Irish

✓ All Clear

Killian Rank #370

Callister Rank #43,579

Killian is more popular, ranked #370 vs #43579 for Callister.

Is Killian or Callister more popular?

Killian is more popular, ranked #370 compared to Callister at #43579 in the United States.

What do Killian and Callister mean?

Killian means "associated with the church" (Irish Gaelic origin). Callister means "defender of men" (Greek via Gaelic origin).

Are Killian and Callister boy or girl names?

Killian is primarily a boy name. Callister is primarily a boy name.