Killian vs Rio

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 #517 Most Popular 2 Syllables

"river"

Origin: Spanish/Portuguese

Spanish Portuguese Brazilian American

✓ All Clear

Killian Rank #370

Rio Rank #517

Killian is more popular, ranked #370 vs #517 for Rio.

Is Killian or Rio more popular?

Killian is more popular, ranked #370 compared to Rio at #517 in the United States.

What do Killian and Rio mean?

Killian means "associated with the church" (Irish Gaelic origin). Rio means "river" (Spanish/Portuguese origin).

Are Killian and Rio boy or girl names?

Killian is primarily a boy name. Rio is primarily a boy name.