Callister vs Thaddaeus

Baby Name Comparison — 2026

Callister

Boy #43,579 Most Popular 3 Syllables

"defender of men"

Origin: Greek via Gaelic

Scottish Manx Irish

✓ All Clear

Boy #5,721 Most Popular 3 Syllables

"heart, courageous heart"

Origin: Aramaic

Christian English Greek Latin

✓ All Clear

Callister Rank #43,579

Thaddaeus Rank #5,721

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

Is Callister or Thaddaeus more popular?

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

What do Callister and Thaddaeus mean?

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

Are Callister and Thaddaeus boy or girl names?

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