Issac vs Rex

Baby Name Comparison — 2026

Issac

Boy #856 Most Popular 2 Syllables

"laughter"

Origin: Hebrew

English American Jewish Christian African-American

✓ All Clear

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Issac Rank #856

Rex Rank #793

Rex is more popular, ranked #793 vs #856 for Issac.

Is Issac or Rex more popular?

Rex is more popular, ranked #793 compared to Issac at #856 in the United States.

What do Issac and Rex mean?

Issac means "laughter" (Hebrew origin). Rex means "king" (Latin origin).

Are Issac and Rex boy or girl names?

Issac is primarily a boy name. Rex is primarily a boy name.