Dennis vs Rex

Baby Name Comparison — 2026

Dennis

Boy #708 Most Popular 2 Syllables

"follower of Dionysus"

Origin: Greek

English French German Irish

✓ All Clear

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Dennis Rank #708

Rex Rank #793

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

Is Dennis or Rex more popular?

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

What do Dennis and Rex mean?

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

Are Dennis and Rex boy or girl names?

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