Rex vs Cain

Baby Name Comparison — 2026

Rex

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Boy #979 Most Popular 1 Syllable

"acquired, possessed"

Origin: Hebrew

English Welsh American

✓ All Clear

Rex Rank #793

Cain Rank #979

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

Is Rex or Cain more popular?

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

What do Rex and Cain mean?

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

Are Rex and Cain boy or girl names?

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