Atreus vs Killian

Baby Name Comparison — 2026

Atreus

Boy #495 Most Popular 3 Syllables

"fearless, not cowardly"

Origin: Greek

American Greek

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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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Atreus Rank #495

Killian Rank #370

Killian is more popular, ranked #370 vs #495 for Atreus.

Is Atreus or Killian more popular?

Killian is more popular, ranked #370 compared to Atreus at #495 in the United States.

What do Atreus and Killian mean?

Atreus means "fearless, not cowardly" (Greek origin). Killian means "associated with the church" (Irish Gaelic origin).

Are Atreus and Killian boy or girl names?

Atreus is primarily a boy name. Killian is primarily a boy name.