Rio vs Dax

Baby Name Comparison — 2026

Rio

Boy #517 Most Popular 2 Syllables

"river"

Origin: Spanish/Portuguese

Spanish Portuguese Brazilian American

✓ All Clear

Boy #640 Most Popular 1 Syllable

"water, thermal waters (place name)"

Origin: French/Basque

English American French

✓ All Clear

Rio Rank #517

Dax Rank #640

Rio is more popular, ranked #517 vs #640 for Dax.

Is Rio or Dax more popular?

Rio is more popular, ranked #517 compared to Dax at #640 in the United States.

What do Rio and Dax mean?

Rio means "river" (Spanish/Portuguese origin). Dax means "water, thermal waters (place name)" (French/Basque origin).

Are Rio and Dax boy or girl names?

Rio is primarily a boy name. Dax is primarily a boy name.