Trey vs Rex

Baby Name Comparison — 2026

Trey

Boy #790 Most Popular 1 Syllable

"three, the third"

Origin: Old French

American English

✓ All Clear

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Trey Rank #790

Rex Rank #793

Trey is more popular, ranked #790 vs #793 for Rex.

Is Trey or Rex more popular?

Trey is more popular, ranked #790 compared to Rex at #793 in the United States.

What do Trey and Rex mean?

Trey means "three, the third" (Old French origin). Rex means "king" (Latin origin).

Are Trey and Rex boy or girl names?

Trey is primarily a boy name. Rex is primarily a boy name.