Rio vs Theodore

Baby Name Comparison — 2026

Rio

Boy #517 Most Popular 2 Syllables

Meaning

"river"

Origin: Spanish/Portuguese

Cultural Roots

Spanish Portuguese Brazilian American

Quick Stats

Popularity Rank
#517
Total SSA Count
591
Syllables
2
Formality
Casual

Playground Safety Score

✓ All Clear
Full profile for Rio →

Popularity Comparison

Rio Rank #517
Theodore Rank #4

Theodore is more popular, ranked #4 vs #517 for Rio.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Rio ___

  • Rio James
  • Rio Alexander
  • Rio Sebastian
  • Rio Marcus
  • Rio Cruz
  • Rio Blue

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 Rio

Finn Kai Luna Isla Milo

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 Rio or Theodore more popular?

Theodore is more popular, ranked #4 compared to Rio at #517 in the United States.

What do Rio and Theodore mean?

Rio means "river" (Spanish/Portuguese origin). Theodore means "divine gift" (Greek origin).

Are Rio and Theodore boy or girl names?

Rio is primarily a boy name. Theodore is primarily a boy name.

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