Kaio vs Theodore

Baby Name Comparison — 2026

Kaio

Boy #4,096 Most Popular 2 Syllables

Meaning

"rejoice, be happy"

Origin: Latin

Cultural Roots

Brazilian Portuguese Japanese American

Quick Stats

Popularity Rank
#4,096
Total SSA Count
26
Syllables
2
Formality
Moderate
Nicknames
Kai

Playground Safety Score

✓ All Clear
Full profile for Kaio →

Popularity Comparison

Kaio Rank #4,096
Theodore Rank #4

Theodore is more popular, ranked #4 vs #4096 for Kaio.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Kaio ___

  • Kaio James
  • Kaio Lee
  • Kaio Andre
  • Kaio Marcus
  • Kaio Zen
  • Kaio Cole

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 Kaio

Kai Luca Mateus Theo Noa

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 Kaio or Theodore more popular?

Theodore is more popular, ranked #4 compared to Kaio at #4096 in the United States.

What do Kaio and Theodore mean?

Kaio means "rejoice, be happy" (Latin origin). Theodore means "divine gift" (Greek origin).

Are Kaio and Theodore boy or girl names?

Kaio is primarily a boy name. Theodore is primarily a boy name.

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