Rex vs Cayson

Baby Name Comparison — 2026

Rex

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Boy #764 Most Popular 2 Syllables

"healer (via Jason)"

Origin: Greek

American

✓ All Clear

Rex Rank #793

Cayson Rank #764

Cayson is more popular, ranked #764 vs #793 for Rex.

Is Rex or Cayson more popular?

Cayson is more popular, ranked #764 compared to Rex at #793 in the United States.

What do Rex and Cayson mean?

Rex means "king" (Latin origin). Cayson means "healer (via Jason)" (Greek origin).

Are Rex and Cayson boy or girl names?

Rex is primarily a boy name. Cayson is primarily a boy name.