Rui vs Theodore

Baby Name Comparison — 2026

Rui

Boy #2,294 Most Popular 2 Syllables

Meaning

"glorious ruler"

Origin: Germanic via Portuguese

Cultural Roots

Portuguese Brazilian Japanese Chinese

Quick Stats

Popularity Rank
#2,294
Total SSA Count
62
Syllables
2
Formality
Moderate
Nicknames
Rui

Playground Safety Score

✓ All Clear
Full profile for Rui →

Popularity Comparison

Rui Rank #2,294
Theodore Rank #4

Theodore is more popular, ranked #4 vs #2294 for Rui.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Rui ___

  • Rui Antonio
  • Rui Miguel
  • Rui Carlos
  • Rui Alexandre
  • Rui Haruki
  • Rui Eito

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 Rui

Ines Ana Diego Mia Sora

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 Rui or Theodore more popular?

Theodore is more popular, ranked #4 compared to Rui at #2294 in the United States.

What do Rui and Theodore mean?

Rui means "glorious ruler" (Germanic via Portuguese origin). Theodore means "divine gift" (Greek origin).

Are Rui and Theodore boy or girl names?

Rui is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

Theodore vs Rui Rui vs Lino Rui vs Boyd Rui vs Riyan Rui vs Amaris
← Full profile: Rui ← Full profile: Theodore Browse all baby names