Killian vs Lewis

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 #435 Most Popular 2 Syllables

"famous warrior"

Origin: Germanic via French

English Welsh French American

✓ All Clear

Killian Rank #370

Lewis Rank #435

Killian is more popular, ranked #370 vs #435 for Lewis.

Is Killian or Lewis more popular?

Killian is more popular, ranked #370 compared to Lewis at #435 in the United States.

What do Killian and Lewis mean?

Killian means "associated with the church" (Irish Gaelic origin). Lewis means "famous warrior" (Germanic via French origin).

Are Killian and Lewis boy or girl names?

Killian is primarily a boy name. Lewis is primarily a boy name.