Kaior vs Rei

Baby Name Comparison — 2026

Kaior

Girl #2,765 Most Popular 2 Syllables

Meaning

"the victorious (if from Cairo)"

Origin: Arabic (Al-Qahira)

Cultural Roots

American

Quick Stats

Popularity Rank
#2,765
Total SSA Count
62
Syllables
2
Formality
Casual
Nicknames
Kai, Kay

Playground Safety Score

✓ All Clear
Full profile for Kaior →

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

Kaior Rank #2,765
Rei Rank #3,800

Kaior is more popular, ranked #2765 vs #3800 for Rei.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Kaior ___

  • Kaior Rose
  • Kaior Lee
  • Kaior Ann
  • Kaior Jade
  • Kaior Grace

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 Kaior

Cairo Kairo Zion Nile Skye

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 Kaior or Rei more popular?

Kaior is more popular, ranked #2765 compared to Rei at #3800 in the United States.

What do Kaior and Rei mean?

Kaior means "the victorious (if from Cairo)" (Arabic (Al-Qahira) origin). Rei means "courtesy, respect, gratitude" (Japanese kanji 礼 origin).

Are Kaior and Rei boy or girl names?

Kaior is primarily a girl name. Rei is primarily a boy name.

More Comparisons

Rei vs Kaior Kaior vs Adrian Kaior vs Rocio Kaior vs Eman Kaior vs Mahlani
← Full profile: Kaior ← Full profile: Rei Browse all baby names