Onyx vs Knox

Baby Name Comparison — 2026

Onyx

Boy #359 Most Popular 2 Syllables

"black gemstone"

Origin: Greek (onyx)

American

✓ All Clear

Boy #209 Most Popular 1 Syllable

"round hill"

Origin: Old English/Scottish

American Scottish English

✓ All Clear

Onyx Rank #359

Knox Rank #209

Knox is more popular, ranked #209 vs #359 for Onyx.

Is Onyx or Knox more popular?

Knox is more popular, ranked #209 compared to Onyx at #359 in the United States.

What do Onyx and Knox mean?

Onyx means "black gemstone" (Greek (onyx) origin). Knox means "round hill" (Old English/Scottish origin).

Are Onyx and Knox boy or girl names?

Onyx is primarily a boy name. Knox is primarily a boy name.