Rex vs Kaiser

Baby Name Comparison — 2026

Rex

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Boy #798 Most Popular 2 Syllables

"emperor, caesar"

Origin: German/Latin

German American Austrian

✓ All Clear

Rex Rank #793

Kaiser Rank #798

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

Is Rex or Kaiser more popular?

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

What do Rex and Kaiser mean?

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

Are Rex and Kaiser boy or girl names?

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