Killian vs Alex

Baby Name Comparison — 2026

Killian

Boy #370 Most Popular 3 Syllables

"associated with the church"

Origin: Irish Gaelic

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Boy #205 Most Popular 2 Syllables

"defender of men"

Origin: Greek

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Killian Rank #370

Alex Rank #205

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

Is Killian or Alex more popular?

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

What do Killian and Alex mean?

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

Are Killian and Alex boy or girl names?

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