Killian vs Callahan

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 #364 Most Popular 3 Syllables

"lover of churches"

Origin: Irish Gaelic

Irish American English

✓ All Clear

Killian Rank #370

Callahan Rank #364

Callahan is more popular, ranked #364 vs #370 for Killian.

Is Killian or Callahan more popular?

Callahan is more popular, ranked #364 compared to Killian at #370 in the United States.

What do Killian and Callahan mean?

Killian means "associated with the church" (Irish Gaelic origin). Callahan means "lover of churches" (Irish Gaelic origin).

Are Killian and Callahan boy or girl names?

Killian is primarily a boy name. Callahan is primarily a boy name.