Blu vs Rei

Baby Name Comparison — 2026

Blu

Boy #3,793 Most Popular 1 Syllable

Meaning

"the color blue, sky"

Origin: Old French 'bleu' via Germanic

Cultural Roots

American English Italian

Quick Stats

Popularity Rank
#3,793
Total SSA Count
29
Syllables
1
Formality
Casual

Playground Safety Score

✓ All Clear
Full profile for Blu →

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

Blu Rank #3,793
Rei Rank #3,800

Blu is more popular, ranked #3793 vs #3800 for Rei.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Blu ___

  • Blu James
  • Blu River
  • Blu Sage
  • Blu Stone
  • Blu August
  • Blu Wolf

Rei ___

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

Sibling Name Ideas

Names that pair well as siblings.

If you choose Blu

Indigo Sage River Gray Scarlett

If you choose Rei

Kai Sora Haru Ryu Suki

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 Blu or Rei more popular?

Blu is more popular, ranked #3793 compared to Rei at #3800 in the United States.

What do Blu and Rei mean?

Blu means "the color blue, sky" (Old French 'bleu' via Germanic origin). Rei means "courtesy, respect, gratitude" (Japanese kanji 礼 origin).

Are Blu and Rei boy or girl names?

Blu is primarily a boy name. Rei is primarily a boy name.

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