Eileen vs Theodore

Baby Name Comparison — 2026

Eileen

Girl #592 Most Popular 2 Syllables

Meaning

"bright, shining one"

Origin: Greek via Irish (Eibhlín)

Cultural Roots

Irish Scottish English American

Quick Stats

Popularity Rank
#592
Total SSA Count
508
Syllables
2
Formality
Moderate
Nicknames
Eillie, Ellie

Playground Safety Score

15 High Risk

{:type=>:rhyme, :severity=>:medium, :message=>"'Eileen' rhymes with 'mean'"}

Full profile for Eileen →

Popularity Comparison

Eileen Rank #592
Theodore Rank #4

Theodore is more popular, ranked #4 vs #592 for Eileen.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Eileen ___

  • Eileen Rose
  • Eileen Marie
  • Eileen Grace
  • Eileen Jean
  • Eileen Frances
  • Eileen Ann

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 Eileen

Brigid Fiona Siobhan Patrick Declan

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 Eileen or Theodore more popular?

Theodore is more popular, ranked #4 compared to Eileen at #592 in the United States.

What do Eileen and Theodore mean?

Eileen means "bright, shining one" (Greek via Irish (Eibhlín) origin). Theodore means "divine gift" (Greek origin).

Are Eileen and Theodore boy or girl names?

Eileen is primarily a girl name. Theodore is primarily a boy name.

More Comparisons

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