Callister vs Killian

Baby Name Comparison — 2026

Callister

Boy #43,579 Most Popular 3 Syllables

"defender of men"

Origin: Greek via Gaelic

Scottish Manx Irish

✓ All Clear

Boy #370 Most Popular 3 Syllables

"associated with the church"

Origin: Irish Gaelic

Irish French American English

✓ All Clear

Callister Rank #43,579

Killian Rank #370

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

Is Callister or Killian more popular?

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

What do Callister and Killian mean?

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

Are Callister and Killian boy or girl names?

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