Rex vs Dennis

Baby Name Comparison — 2026

Rex

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Boy #708 Most Popular 2 Syllables

"follower of Dionysus"

Origin: Greek

English French German Irish

✓ All Clear

Rex Rank #793

Dennis Rank #708

Dennis is more popular, ranked #708 vs #793 for Rex.

Is Rex or Dennis more popular?

Dennis is more popular, ranked #708 compared to Rex at #793 in the United States.

What do Rex and Dennis mean?

Rex means "king" (Latin origin). Dennis means "follower of Dionysus" (Greek origin).

Are Rex and Dennis boy or girl names?

Rex is primarily a boy name. Dennis is primarily a boy name.