Callister vs Theodore

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 Most Popular 3 Syllables

"divine gift"

Origin: Greek

English French Greek

✓ All Clear

Callister Rank #43,579

Theodore Rank #4

Theodore is more popular, ranked #4 vs #43579 for Callister.

Is Callister or Theodore more popular?

Theodore is more popular, ranked #4 compared to Callister at #43579 in the United States.

What do Callister and Theodore mean?

Callister means "defender of men" (Greek via Gaelic origin). Theodore means "divine gift" (Greek origin).

Are Callister and Theodore boy or girl names?

Callister is primarily a boy name. Theodore is primarily a boy name.