Cosmo vs Callister

Baby Name Comparison — 2026

Cosmo

Boy #1,691 Most Popular 2 Syllables

"order, universe"

Origin: Greek

Italian Greek English American

✓ All Clear

Boy #43,579 Most Popular 3 Syllables

"defender of men"

Origin: Greek via Gaelic

Scottish Manx Irish

✓ All Clear

Cosmo Rank #1,691

Callister Rank #43,579

Cosmo is more popular, ranked #1691 vs #43579 for Callister.

Is Cosmo or Callister more popular?

Cosmo is more popular, ranked #1691 compared to Callister at #43579 in the United States.

What do Cosmo and Callister mean?

Cosmo means "order, universe" (Greek origin). Callister means "defender of men" (Greek via Gaelic origin).

Are Cosmo and Callister boy or girl names?

Cosmo is primarily a boy name. Callister is primarily a boy name.