Sullivan vs Onyx

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 #359 Most Popular 2 Syllables

"black gemstone"

Origin: Greek (onyx)

American

✓ All Clear

Sullivan Rank #340

Onyx Rank #359

Sullivan is more popular, ranked #340 vs #359 for Onyx.

Is Sullivan or Onyx more popular?

Sullivan is more popular, ranked #340 compared to Onyx at #359 in the United States.

What do Sullivan and Onyx mean?

Sullivan means "descendant of the dark one" (Irish Gaelic origin). Onyx means "black gemstone" (Greek (onyx) origin).

Are Sullivan and Onyx boy or girl names?

Sullivan is primarily a boy name. Onyx is primarily a boy name.