Alex vs Killian

Baby Name Comparison — 2026

Alex

Boy #205 Most Popular 2 Syllables

"defender of men"

Origin: Greek

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Boy #370 Most Popular 3 Syllables

"associated with the church"

Origin: Irish Gaelic

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Alex Rank #205

Killian Rank #370

Alex is more popular, ranked #205 vs #370 for Killian.

Is Alex or Killian more popular?

Alex is more popular, ranked #205 compared to Killian at #370 in the United States.

What do Alex and Killian mean?

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

Are Alex and Killian boy or girl names?

Alex is primarily a boy name. Killian is primarily a boy name.