Rex vs Thaddeus

Baby Name Comparison — 2026

Rex

Boy #793 Most Popular 1 Syllable

"king"

Origin: Latin

English Latin American

✓ All Clear

Boy #850 Most Popular 3 Syllables

"courageous heart"

Origin: Aramaic

English Polish American Catholic

✓ All Clear

Rex Rank #793

Thaddeus Rank #850

Rex is more popular, ranked #793 vs #850 for Thaddeus.

Is Rex or Thaddeus more popular?

Rex is more popular, ranked #793 compared to Thaddeus at #850 in the United States.

What do Rex and Thaddeus mean?

Rex means "king" (Latin origin). Thaddeus means "courageous heart" (Aramaic origin).

Are Rex and Thaddeus boy or girl names?

Rex is primarily a boy name. Thaddeus is primarily a boy name.