Rex vs Grey

Baby Name Comparison — 2026

Rex

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Boy #878 Most Popular 1 Syllable

"gray-haired one"

Origin: Old English

English American Australian

✓ All Clear

Rex Rank #793

Grey Rank #878

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

Is Rex or Grey more popular?

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

What do Rex and Grey mean?

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

Are Rex and Grey boy or girl names?

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