Rei vs Theodore

Baby Name Comparison — 2026

Rei

Boy #3,800 Most Popular 1 Syllable

Meaning

"courtesy, respect, gratitude"

Origin: Japanese kanji 礼

Cultural Roots

Japanese American Brazilian

Quick Stats

Popularity Rank
#3,800
Total SSA Count
29
Syllables
1
Formality
Moderate

Playground Safety Score

✓ All Clear
Full profile for Rei →

Popularity Comparison

Rei Rank #3,800
Theodore Rank #4

Theodore is more popular, ranked #4 vs #3800 for Rei.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Rei ___

  • Rei James
  • Rei Thomas
  • Rei Alexander
  • Rei Kenji
  • Rei Haruki
  • Rei Jun

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 Rei

Kai Sora Haru Ryu Suki

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 Rei or Theodore more popular?

Theodore is more popular, ranked #4 compared to Rei at #3800 in the United States.

What do Rei and Theodore mean?

Rei means "courtesy, respect, gratitude" (Japanese kanji 礼 origin). Theodore means "divine gift" (Greek origin).

Are Rei and Theodore boy or girl names?

Rei is primarily a boy name. Theodore is primarily a boy name.

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