Cass vs Onix

Baby Name Comparison — 2026

Cass

Boy #5,414 Most Popular 1 Syllable

"hollow, vain (from Latin Cassius)"

Origin: Latin

English American Greek

✓ All Clear

Boy #5,293 Most Popular 2 Syllables

"black banded gemstone"

Origin: Greek

American Latin American Spanish

✓ All Clear

Cass Rank #5,414

Onix Rank #5,293

Onix is more popular, ranked #5293 vs #5414 for Cass.

Is Cass or Onix more popular?

Onix is more popular, ranked #5293 compared to Cass at #5414 in the United States.

What do Cass and Onix mean?

Cass means "hollow, vain (from Latin Cassius)" (Latin origin). Onix means "black banded gemstone" (Greek origin).

Are Cass and Onix boy or girl names?

Cass is primarily a boy name. Onix is primarily a boy name.