Rex vs Duke

Baby Name Comparison — 2026

Rex

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Boy #710 Most Popular 1 Syllable

"leader, military commander"

Origin: Latin

American English Australian

✓ All Clear

Rex Rank #793

Duke Rank #710

Duke is more popular, ranked #710 vs #793 for Rex.

Is Rex or Duke more popular?

Duke is more popular, ranked #710 compared to Rex at #793 in the United States.

What do Rex and Duke mean?

Rex means "king" (Latin origin). Duke means "leader, military commander" (Latin origin).

Are Rex and Duke boy or girl names?

Rex is primarily a boy name. Duke is primarily a boy name.