Onyx vs Casey

Baby Name Comparison — 2026

Onyx

Boy #359 Most Popular 2 Syllables

"black gemstone"

Origin: Greek (onyx)

American

✓ All Clear

Boy #310 Most Popular 2 Syllables

Irish English American

✓ All Clear

Onyx Rank #359

Casey Rank #310

Casey is more popular, ranked #310 vs #359 for Onyx.

Is Onyx or Casey more popular?

Casey is more popular, ranked #310 compared to Onyx at #359 in the United States.

What do Onyx and Casey mean?

Onyx means "black gemstone" (Greek (onyx) origin).

Are Onyx and Casey boy or girl names?

Onyx is primarily a boy name. Casey is primarily a boy name.