Kelsey vs Theodore

Baby Name Comparison — 2026

Kelsey

Girl #670 Most Popular 2 Syllables

Meaning

"Ceol's island, ship island"

Origin: Old English

Cultural Roots

American English

Quick Stats

Popularity Rank
#670
Total SSA Count
430
Syllables
2
Formality
Casual
Nicknames
Kels

Playground Safety Score

✓ All Clear
Full profile for Kelsey →

Popularity Comparison

Kelsey Rank #670
Theodore Rank #4

Theodore is more popular, ranked #4 vs #670 for Kelsey.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Kelsey ___

  • Kelsey Ann
  • Kelsey Marie
  • Kelsey Grace
  • Kelsey Lynn
  • Kelsey Jane
  • Kelsey Renee

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 Kelsey

Ashley Brittany Megan Tyler Brandon

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 Kelsey or Theodore more popular?

Theodore is more popular, ranked #4 compared to Kelsey at #670 in the United States.

What do Kelsey and Theodore mean?

Kelsey means "Ceol's island, ship island" (Old English origin). Theodore means "divine gift" (Greek origin).

Are Kelsey and Theodore boy or girl names?

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

More Comparisons

Theodore vs Kelsey Kelsey vs Alexa Kelsey vs Scarlet Kelsey vs Elle Kelsey vs Milena
← Full profile: Kelsey ← Full profile: Theodore Browse all baby names