Kay vs Theodore

Baby Name Comparison — 2026

Kay

Girl #3,887 Most Popular 1 Syllable

Meaning

"pure, clean"

Origin: Greek via Katherine

Cultural Roots

English American Scandinavian

Quick Stats

Popularity Rank
#3,887
Total SSA Count
38
Syllables
1
Formality
Casual

Playground Safety Score

✓ All Clear
Full profile for Kay →

Popularity Comparison

Kay Rank #3,887
Theodore Rank #4

Theodore is more popular, ranked #4 vs #3887 for Kay.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Kay ___

  • Kay Louise
  • Kay Anne
  • Kay Marie
  • Kay Elizabeth
  • Kay Margaret
  • Kay Elise

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 Kay

Lee Dale Jo Quinn Brooks

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 Kay or Theodore more popular?

Theodore is more popular, ranked #4 compared to Kay at #3887 in the United States.

What do Kay and Theodore mean?

Kay means "pure, clean" (Greek via Katherine origin). Theodore means "divine gift" (Greek origin).

Are Kay and Theodore boy or girl names?

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

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