Sullivan vs Sonny

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 #336 Most Popular 2 Syllables

"son, young boy"

Origin: English

American English Italian-American

✓ All Clear

Sullivan Rank #340

Sonny Rank #336

Sonny is more popular, ranked #336 vs #340 for Sullivan.

Is Sullivan or Sonny more popular?

Sonny is more popular, ranked #336 compared to Sullivan at #340 in the United States.

What do Sullivan and Sonny mean?

Sullivan means "descendant of the dark one" (Irish Gaelic origin). Sonny means "son, young boy" (English origin).

Are Sullivan and Sonny boy or girl names?

Sullivan is primarily a boy name. Sonny is primarily a boy name.