Billy vs Callister

Baby Name Comparison — 2026

Billy

Boy #1,051 Most Popular 2 Syllables

"resolute protector"

Origin: Old German via Norman French

English American Australian Irish

✓ All Clear

Boy #43,579 Most Popular 3 Syllables

"defender of men"

Origin: Greek via Gaelic

Scottish Manx Irish

✓ All Clear

Billy Rank #1,051

Callister Rank #43,579

Billy is more popular, ranked #1051 vs #43579 for Callister.

Is Billy or Callister more popular?

Billy is more popular, ranked #1051 compared to Callister at #43579 in the United States.

What do Billy and Callister mean?

Billy means "resolute protector" (Old German via Norman French origin). Callister means "defender of men" (Greek via Gaelic origin).

Are Billy and Callister boy or girl names?

Billy is primarily a boy name. Callister is primarily a boy name.