Thaddaeus vs Callister

Baby Name Comparison — 2026

Thaddaeus

Boy #5,721 Most Popular 3 Syllables

"heart, courageous heart"

Origin: Aramaic

Christian English Greek Latin

✓ All Clear

Boy #43,579 Most Popular 3 Syllables

"defender of men"

Origin: Greek via Gaelic

Scottish Manx Irish

✓ All Clear

Thaddaeus Rank #5,721

Callister Rank #43,579

Thaddaeus is more popular, ranked #5721 vs #43579 for Callister.

Is Thaddaeus or Callister more popular?

Thaddaeus is more popular, ranked #5721 compared to Callister at #43579 in the United States.

What do Thaddaeus and Callister mean?

Thaddaeus means "heart, courageous heart" (Aramaic origin). Callister means "defender of men" (Greek via Gaelic origin).

Are Thaddaeus and Callister boy or girl names?

Thaddaeus is primarily a boy name. Callister is primarily a boy name.