Onix vs Theodore

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

Onix Rank #5,293
Theodore Rank #4

Theodore is more popular, ranked #4 vs #5293 for Onix.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Onix ___

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

Theodore ___

  • Theodore James
  • Theodore William
  • Theodore Alexander
  • Theodore John
  • Theodore Henry
  • Theodore Arthur

Sibling Name Ideas

Names that pair well as siblings.

If you choose Onix

Jasper Slate Phoenix Jade Raven

If you choose Theodore

Olivia Charlotte Amelia Eleanor Oliver

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 Onix or Theodore more popular?

Theodore is more popular, ranked #4 compared to Onix at #5293 in the United States.

What do Onix and Theodore mean?

Onix means "black banded gemstone" (Greek origin). Theodore means "divine gift" (Greek origin).

Are Onix and Theodore boy or girl names?

Onix is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

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