Callister vs Cleo

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 #4,718 Most Popular 2 Syllables

"short form of Cleopatra"

Origin: Greek

English American European Australian

✓ All Clear

Callister Rank #43,579

Cleo Rank #4,718

Cleo is more popular, ranked #4718 vs #43579 for Callister.

Is Callister or Cleo more popular?

Cleo is more popular, ranked #4718 compared to Callister at #43579 in the United States.

What do Callister and Cleo mean?

Callister means "defender of men" (Greek via Gaelic origin). Cleo means "short form of Cleopatra" (Greek origin).

Are Callister and Cleo boy or girl names?

Callister is primarily a boy name. Cleo is primarily a boy name.