Rex vs Dillon

Baby Name Comparison — 2026

Rex

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Boy #870 Most Popular 2 Syllables

"great tide, son of the sea"

Origin: Welsh

Irish Welsh American English

✓ All Clear

Rex Rank #793

Dillon Rank #870

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

Is Rex or Dillon more popular?

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

What do Rex and Dillon mean?

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

Are Rex and Dillon boy or girl names?

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