Caitlyn vs Theodore

Baby Name Comparison — 2026

Caitlyn

Girl #2,348 Most Popular 2 Syllables

Meaning

"pure, unblemished"

Origin: Greek via Irish

Cultural Roots

Irish Welsh American British

Quick Stats

Popularity Rank
#2,348
Total SSA Count
78
Syllables
2
Formality
Moderate
Nicknames
Cait, Kate, Katie

Playground Safety Score

✓ All Clear
Full profile for Caitlyn →

Popularity Comparison

Caitlyn Rank #2,348
Theodore Rank #4

Theodore is more popular, ranked #4 vs #2348 for Caitlyn.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Caitlyn ___

  • Caitlyn Grace
  • Caitlyn Rose
  • Caitlyn Marie
  • Caitlyn Lynn
  • Caitlyn Anne
  • Caitlyn Jane

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 Caitlyn

Brendan Declan Siobhan Aoife 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 Caitlyn or Theodore more popular?

Theodore is more popular, ranked #4 compared to Caitlyn at #2348 in the United States.

What do Caitlyn and Theodore mean?

Caitlyn means "pure, unblemished" (Greek via Irish origin). Theodore means "divine gift" (Greek origin).

Are Caitlyn and Theodore boy or girl names?

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

More Comparisons

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