Rei vs Zai

Baby Name Comparison — 2026

Rei

Boy #3,800 Most Popular 1 Syllable

"courtesy, respect, gratitude"

Origin: Japanese kanji 礼

Japanese American Brazilian

✓ All Clear

Boy #3,946 Most Popular 1 Syllable

"to be, to exist, present"

Origin: Chinese (在)

Chinese American

✓ All Clear

Rei Rank #3,800

Zai Rank #3,946

Rei is more popular, ranked #3800 vs #3946 for Zai.

Is Rei or Zai more popular?

Rei is more popular, ranked #3800 compared to Zai at #3946 in the United States.

What do Rei and Zai mean?

Rei means "courtesy, respect, gratitude" (Japanese kanji 礼 origin). Zai means "to be, to exist, present" (Chinese (在) origin).

Are Rei and Zai boy or girl names?

Rei is primarily a boy name. Zai is primarily a boy name.