Mac vs Rex

Baby Name Comparison — 2026

Mac

Boy #696 Most Popular 1 Syllable

"son of"

Origin: Scottish Gaelic

Scottish Irish American

✓ All Clear

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Mac Rank #696

Rex Rank #793

Mac is more popular, ranked #696 vs #793 for Rex.

Is Mac or Rex more popular?

Mac is more popular, ranked #696 compared to Rex at #793 in the United States.

What do Mac and Rex mean?

Mac means "son of" (Scottish Gaelic origin). Rex means "king" (Latin origin).

Are Mac and Rex boy or girl names?

Mac is primarily a boy name. Rex is primarily a boy name.