Grey vs Rex

Baby Name Comparison — 2026

Grey

Boy #878 Most Popular 1 Syllable

"gray-haired one"

Origin: Old English

English American Australian

✓ All Clear

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Grey Rank #878

Rex Rank #793

Rex is more popular, ranked #793 vs #878 for Grey.

Is Grey or Rex more popular?

Rex is more popular, ranked #793 compared to Grey at #878 in the United States.

What do Grey and Rex mean?

Grey means "gray-haired one" (Old English origin). Rex means "king" (Latin origin).

Are Grey and Rex boy or girl names?

Grey is primarily a boy name. Rex is primarily a boy name.