Rex vs Sincere

Baby Name Comparison — 2026

Rex

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Boy #605 Most Popular 2 Syllables

"genuine, honest, without deceit"

Origin: Latin

American African American

✓ All Clear

Rex Rank #793

Sincere Rank #605

Sincere is more popular, ranked #605 vs #793 for Rex.

Is Rex or Sincere more popular?

Sincere is more popular, ranked #605 compared to Rex at #793 in the United States.

What do Rex and Sincere mean?

Rex means "king" (Latin origin). Sincere means "genuine, honest, without deceit" (Latin origin).

Are Rex and Sincere boy or girl names?

Rex is primarily a boy name. Sincere is primarily a boy name.