Casey vs Killian

Baby Name Comparison — 2026

Casey

Boy #310 Most Popular 2 Syllables

Irish English American

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Boy #370 Most Popular 3 Syllables

"associated with the church"

Origin: Irish Gaelic

Irish French American English

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Casey Rank #310

Killian Rank #370

Casey is more popular, ranked #310 vs #370 for Killian.

Is Casey or Killian more popular?

Casey is more popular, ranked #310 compared to Killian at #370 in the United States.

What do Casey and Killian mean?

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

Are Casey and Killian boy or girl names?

Casey is primarily a boy name. Killian is primarily a boy name.