Kei vs Theodore

Baby Name Comparison — 2026

Kei

Boy #4,606 Most Popular 1 Syllable

Meaning

"joy, jubilation"

Origin: Japanese kanji 慶

Cultural Roots

Japanese American Hawaiian

Quick Stats

Popularity Rank
#4,606
Total SSA Count
22
Syllables
1
Formality
Moderate

Playground Safety Score

✓ All Clear
Full profile for Kei →

Popularity Comparison

Kei Rank #4,606
Theodore Rank #4

Theodore is more popular, ranked #4 vs #4606 for Kei.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Kei ___

  • Kei James
  • Kei Alexander
  • Kei William
  • Kei Michael
  • Kei Lee
  • Kei Thomas

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 Kei

Kai Ren Hiro Mia Yuki

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 Kei or Theodore more popular?

Theodore is more popular, ranked #4 compared to Kei at #4606 in the United States.

What do Kei and Theodore mean?

Kei means "joy, jubilation" (Japanese kanji 慶 origin). Theodore means "divine gift" (Greek origin).

Are Kei and Theodore boy or girl names?

Kei is primarily a boy name. Theodore is primarily a boy name.

More Comparisons

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