Ruairi vs Theodore

Baby Name Comparison — 2026

Ruairi

Boy #6,527 Most Popular 3 Syllables

Meaning

"red king"

Origin: Old Irish ruadh (red) + ri (king)

Cultural Roots

Irish Scottish British

Quick Stats

Popularity Rank
#6,527
Total SSA Count
13
Syllables
3
Formality
Moderate
Nicknames
Ru, Rue, Rua

Playground Safety Score

✓ All Clear
Full profile for Ruairi →

Popularity Comparison

Ruairi Rank #6,527
Theodore Rank #4

Theodore is more popular, ranked #4 vs #6527 for Ruairi.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Ruairi ___

  • Ruairi James
  • Ruairi Cian
  • Ruairi Finn
  • Ruairi Patrick
  • Ruairi Sean
  • Ruairi Declan

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 Ruairi

Ciaran Siobhan Aoife Fionn Niamh

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 Ruairi or Theodore more popular?

Theodore is more popular, ranked #4 compared to Ruairi at #6527 in the United States.

What do Ruairi and Theodore mean?

Ruairi means "red king" (Old Irish ruadh (red) + ri (king) origin). Theodore means "divine gift" (Greek origin).

Are Ruairi and Theodore boy or girl names?

Ruairi is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

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