Thadeo vs Callister

Baby Name Comparison — 2026

Thadeo

Boy #4,913 Most Popular 3 Syllables

"courageous heart"

Origin: Aramaic

Spanish Portuguese Latin American East African Polish

✓ All Clear

Boy #43,579 Most Popular 3 Syllables

"defender of men"

Origin: Greek via Gaelic

Scottish Manx Irish

✓ All Clear

Thadeo Rank #4,913

Callister Rank #43,579

Thadeo is more popular, ranked #4913 vs #43579 for Callister.

Is Thadeo or Callister more popular?

Thadeo is more popular, ranked #4913 compared to Callister at #43579 in the United States.

What do Thadeo and Callister mean?

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

Are Thadeo and Callister boy or girl names?

Thadeo is primarily a boy name. Callister is primarily a boy name.