Sullivan vs Alonzo

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 #514 Most Popular 3 Syllables

"noble and ready"

Origin: Visigothic Germanic

Spanish Italian American African American

✓ All Clear

Sullivan Rank #340

Alonzo Rank #514

Sullivan is more popular, ranked #340 vs #514 for Alonzo.

Is Sullivan or Alonzo more popular?

Sullivan is more popular, ranked #340 compared to Alonzo at #514 in the United States.

What do Sullivan and Alonzo mean?

Sullivan means "descendant of the dark one" (Irish Gaelic origin). Alonzo means "noble and ready" (Visigothic Germanic origin).

Are Sullivan and Alonzo boy or girl names?

Sullivan is primarily a boy name. Alonzo is primarily a boy name.