Casper vs Rex

Baby Name Comparison — 2026

Casper

Boy #881 Most Popular 2 Syllables

"treasurer, keeper of treasure"

Origin: Persian

Dutch Scandinavian German English

✓ All Clear

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Casper Rank #881

Rex Rank #793

Rex is more popular, ranked #793 vs #881 for Casper.

Is Casper or Rex more popular?

Rex is more popular, ranked #793 compared to Casper at #881 in the United States.

What do Casper and Rex mean?

Casper means "treasurer, keeper of treasure" (Persian origin). Rex means "king" (Latin origin).

Are Casper and Rex boy or girl names?

Casper is primarily a boy name. Rex is primarily a boy name.