Sullivan vs Mack

Baby Name Comparison — 2026

Sullivan

Boy #340 Most Popular 3 Syllables

"descendant of the dark one"

Origin: Irish Gaelic

Irish American English

✓ All Clear

Boy #499 Most Popular 1 Syllable

"son of"

Origin: Scottish Gaelic

Scottish Irish American

✓ All Clear

Sullivan Rank #340

Mack Rank #499

Sullivan is more popular, ranked #340 vs #499 for Mack.

Is Sullivan or Mack more popular?

Sullivan is more popular, ranked #340 compared to Mack at #499 in the United States.

What do Sullivan and Mack mean?

Sullivan means "descendant of the dark one" (Irish Gaelic origin). Mack means "son of" (Scottish Gaelic origin).

Are Sullivan and Mack boy or girl names?

Sullivan is primarily a boy name. Mack is primarily a boy name.