Greg vs Callister

Baby Name Comparison — 2026

Greg

Boy #4,526 Most Popular 1 Syllable

"watchful, alert"

Origin: Greek

English American European

✓ All Clear

Boy #43,579 Most Popular 3 Syllables

"defender of men"

Origin: Greek via Gaelic

Scottish Manx Irish

✓ All Clear

Greg Rank #4,526

Callister Rank #43,579

Greg is more popular, ranked #4526 vs #43579 for Callister.

Is Greg or Callister more popular?

Greg is more popular, ranked #4526 compared to Callister at #43579 in the United States.

What do Greg and Callister mean?

Greg means "watchful, alert" (Greek origin). Callister means "defender of men" (Greek via Gaelic origin).

Are Greg and Callister boy or girl names?

Greg is primarily a boy name. Callister is primarily a boy name.