Rex vs Allan

Baby Name Comparison — 2026

Rex

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Boy #854 Most Popular 2 Syllables

"rock, harmony"

Origin: Celtic/Brythonic

Scottish English French American

✓ All Clear

Rex Rank #793

Allan Rank #854

Rex is more popular, ranked #793 vs #854 for Allan.

Is Rex or Allan more popular?

Rex is more popular, ranked #793 compared to Allan at #854 in the United States.

What do Rex and Allan mean?

Rex means "king" (Latin origin). Allan means "rock, harmony" (Celtic/Brythonic origin).

Are Rex and Allan boy or girl names?

Rex is primarily a boy name. Allan is primarily a boy name.