Katlyn vs Theodore

Baby Name Comparison — 2026

Popularity Comparison

Katlyn Rank #5,604
Theodore Rank #4

Theodore is more popular, ranked #4 vs #5604 for Katlyn.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Katlyn ___

  • Katlyn Rose
  • Katlyn Marie
  • Katlyn Grace
  • Katlyn Ann
  • Katlyn Elizabeth

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 Katlyn

Megan Brianna Connor Ryan Erin

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 Katlyn or Theodore more popular?

Theodore is more popular, ranked #4 compared to Katlyn at #5604 in the United States.

What do Katlyn and Theodore mean?

Katlyn means "pure" (Greek via Irish origin). Theodore means "divine gift" (Greek origin).

Are Katlyn and Theodore boy or girl names?

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

More Comparisons

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