Mack vs Rio

Baby Name Comparison — 2026

Mack

Boy #499 Most Popular 1 Syllable

"son of"

Origin: Scottish Gaelic

Scottish Irish American

✓ All Clear

Boy #517 Most Popular 2 Syllables

"river"

Origin: Spanish/Portuguese

Spanish Portuguese Brazilian American

✓ All Clear

Mack Rank #499

Rio Rank #517

Mack is more popular, ranked #499 vs #517 for Rio.

Is Mack or Rio more popular?

Mack is more popular, ranked #499 compared to Rio at #517 in the United States.

What do Mack and Rio mean?

Mack means "son of" (Scottish Gaelic origin). Rio means "river" (Spanish/Portuguese origin).

Are Mack and Rio boy or girl names?

Mack is primarily a boy name. Rio is primarily a boy name.