Callister vs Casyn

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 #4,583 Most Popular 2 Syllables

"vigilant, watchful"

Origin: Irish Gaelic

American Irish English

✓ All Clear

Callister Rank #43,579

Casyn Rank #4,583

Casyn is more popular, ranked #4583 vs #43579 for Callister.

Is Callister or Casyn more popular?

Casyn is more popular, ranked #4583 compared to Callister at #43579 in the United States.

What do Callister and Casyn mean?

Callister means "defender of men" (Greek via Gaelic origin). Casyn means "vigilant, watchful" (Irish Gaelic origin).

Are Callister and Casyn boy or girl names?

Callister is primarily a boy name. Casyn is primarily a boy name.