Killian vs Aidan

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 #312 Most Popular 2 Syllables

Irish Scottish English American

✓ All Clear

Killian Rank #370

Aidan Rank #312

Aidan is more popular, ranked #312 vs #370 for Killian.

Is Killian or Aidan more popular?

Aidan is more popular, ranked #312 compared to Killian at #370 in the United States.

What do Killian and Aidan mean?

Killian means "associated with the church" (Irish Gaelic origin).

Are Killian and Aidan boy or girl names?

Killian is primarily a boy name. Aidan is primarily a boy name.