Rex vs Dax

Baby Name Comparison — 2026

Rex

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Boy #640 Most Popular 1 Syllable

"water, thermal waters (place name)"

Origin: French/Basque

English American French

✓ All Clear

Rex Rank #793

Dax Rank #640

Dax is more popular, ranked #640 vs #793 for Rex.

Is Rex or Dax more popular?

Dax is more popular, ranked #640 compared to Rex at #793 in the United States.

What do Rex and Dax mean?

Rex means "king" (Latin origin). Dax means "water, thermal waters (place name)" (French/Basque origin).

Are Rex and Dax boy or girl names?

Rex is primarily a boy name. Dax is primarily a boy name.