Kaiser vs Rex

Baby Name Comparison — 2026

Kaiser

Boy #798 Most Popular 2 Syllables

"emperor, caesar"

Origin: German/Latin

German American Austrian

✓ All Clear

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Kaiser Rank #798

Rex Rank #793

Rex is more popular, ranked #793 vs #798 for Kaiser.

Is Kaiser or Rex more popular?

Rex is more popular, ranked #793 compared to Kaiser at #798 in the United States.

What do Kaiser and Rex mean?

Kaiser means "emperor, caesar" (German/Latin origin). Rex means "king" (Latin origin).

Are Kaiser and Rex boy or girl names?

Kaiser is primarily a boy name. Rex is primarily a boy name.