Kailey vs Theodore

Baby Name Comparison — 2026

Kailey

Girl #1,284 Most Popular 2 Syllables

Meaning

"slender, graceful"

Origin: Irish Gaelic

Cultural Roots

American Irish English

Quick Stats

Popularity Rank
#1,284
Total SSA Count
180
Syllables
2
Formality
Casual
Nicknames
Kay, Kai

Playground Safety Score

✓ All Clear
Full profile for Kailey →

Popularity Comparison

Kailey Rank #1,284
Theodore Rank #4

Theodore is more popular, ranked #4 vs #1284 for Kailey.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Kailey ___

  • Kailey Ann
  • Kailey Grace
  • Kailey Marie
  • Kailey Rose
  • Kailey Elizabeth
  • Kailey Nicole

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 Kailey

Hailey Bailey Kylie Rylee Brielle

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 Kailey or Theodore more popular?

Theodore is more popular, ranked #4 compared to Kailey at #1284 in the United States.

What do Kailey and Theodore mean?

Kailey means "slender, graceful" (Irish Gaelic origin). Theodore means "divine gift" (Greek origin).

Are Kailey and Theodore boy or girl names?

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

More Comparisons

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