Rex vs Kellan

Baby Name Comparison — 2026

Rex

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Boy #919 Most Popular 2 Syllables

"slender, bright-headed"

Origin: Irish Gaelic

Irish Scottish American

✓ All Clear

Rex Rank #793

Kellan Rank #919

Rex is more popular, ranked #793 vs #919 for Kellan.

Is Rex or Kellan more popular?

Rex is more popular, ranked #793 compared to Kellan at #919 in the United States.

What do Rex and Kellan mean?

Rex means "king" (Latin origin). Kellan means "slender, bright-headed" (Irish Gaelic origin).

Are Rex and Kellan boy or girl names?

Rex is primarily a boy name. Kellan is primarily a boy name.