Dillon vs Rex

Baby Name Comparison — 2026

Dillon

Boy #870 Most Popular 2 Syllables

"great tide, son of the sea"

Origin: Welsh

Irish Welsh American English

✓ All Clear

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Dillon Rank #870

Rex Rank #793

Rex is more popular, ranked #793 vs #870 for Dillon.

Is Dillon or Rex more popular?

Rex is more popular, ranked #793 compared to Dillon at #870 in the United States.

What do Dillon and Rex mean?

Dillon means "great tide, son of the sea" (Welsh origin). Rex means "king" (Latin origin).

Are Dillon and Rex boy or girl names?

Dillon is primarily a boy name. Rex is primarily a boy name.