Rio vs Killian

Baby Name Comparison — 2026

Rio

Boy #517 Most Popular 2 Syllables

"river"

Origin: Spanish/Portuguese

Spanish Portuguese Brazilian American

✓ All Clear

Boy #370 Most Popular 3 Syllables

"associated with the church"

Origin: Irish Gaelic

Irish French American English

✓ All Clear

Rio Rank #517

Killian Rank #370

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

Is Rio or Killian more popular?

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

What do Rio and Killian mean?

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

Are Rio and Killian boy or girl names?

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