Cain vs Rex

Baby Name Comparison — 2026

Cain

Boy #979 Most Popular 1 Syllable

"acquired, possessed"

Origin: Hebrew

English Welsh American

✓ All Clear

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Cain Rank #979

Rex Rank #793

Rex is more popular, ranked #793 vs #979 for Cain.

Is Cain or Rex more popular?

Rex is more popular, ranked #793 compared to Cain at #979 in the United States.

What do Cain and Rex mean?

Cain means "acquired, possessed" (Hebrew origin). Rex means "king" (Latin origin).

Are Cain and Rex boy or girl names?

Cain is primarily a boy name. Rex is primarily a boy name.