Fionn vs Theodore

Baby Name Comparison — 2026

Fionn

Boy #4,580 Most Popular 1 Syllable

Meaning

"fair, white, bright"

Origin: Old Irish

Cultural Roots

Irish Scottish Celtic

Quick Stats

Popularity Rank
#4,580
Total SSA Count
22
Syllables
1
Formality
Moderate
Nicknames
Finn, Fio

Playground Safety Score

✓ All Clear
Full profile for Fionn →

Popularity Comparison

Fionn Rank #4,580
Theodore Rank #4

Theodore is more popular, ranked #4 vs #4580 for Fionn.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Fionn ___

  • Fionn James
  • Fionn Patrick
  • Fionn Cian
  • Fionn Sean
  • Fionn Rory
  • Fionn Hugh

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 Fionn

Saoirse Niamh Cillian Aoife Oisin

If you choose Theodore

Olivia Charlotte Amelia Eleanor Oliver

Which Name Fits Your Family?

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Frequently Asked Questions

Is Fionn or Theodore more popular?

Theodore is more popular, ranked #4 compared to Fionn at #4580 in the United States.

What do Fionn and Theodore mean?

Fionn means "fair, white, bright" (Old Irish origin). Theodore means "divine gift" (Greek origin).

Are Fionn and Theodore boy or girl names?

Fionn is primarily a boy name. Theodore is primarily a boy name.

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