Cosmo vs Onix

Baby Name Comparison — 2026

Onix

Boy #5,293 Most Popular 2 Syllables

Meaning

"black banded gemstone"

Origin: Greek

Cultural Roots

American Latin American Spanish

Quick Stats

Popularity Rank
#5,293
Total SSA Count
18
Syllables
2
Formality
Moderate
Nicknames
Oni

Playground Safety Score

✓ All Clear
Full profile for Onix →

Popularity Comparison

Cosmo Rank #1,691
Onix Rank #5,293

Cosmo is more popular, ranked #1691 vs #5293 for Onix.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Cosmo ___

  • Cosmo James
  • Cosmo Ray
  • Cosmo Lee
  • Cosmo Blue
  • Cosmo Fox

Onix ___

  • Onix James
  • Onix Ray
  • Onix Kai
  • Onix Cruz
  • Onix Stone
  • Onix Lee

Sibling Name Ideas

Names that pair well as siblings.

If you choose Cosmo

Cosima Orion Luna Stellan Felix

If you choose Onix

Jasper Slate Phoenix Jade Raven

Which Name Fits Your Family?

Answer 3 quick questions and we'll help you decide.

1. Which style feels more like your family?

Frequently Asked Questions

Is Cosmo or Onix more popular?

Cosmo is more popular, ranked #1691 compared to Onix at #5293 in the United States.

What do Cosmo and Onix mean?

Cosmo means "order, universe" (Greek origin). Onix means "black banded gemstone" (Greek origin).

Are Cosmo and Onix boy or girl names?

Cosmo is primarily a boy name. Onix is primarily a boy name.

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← Full profile: Cosmo ← Full profile: Onix Browse all baby names