Harmoni vs Kai

Baby Name Comparison — 2026

Harmoni

Girl #993 Most Popular 3 Syllables

Meaning

"agreement, concord, fitting together"

Origin: Greek

Cultural Roots

English American Greek mythology

Quick Stats

Popularity Rank
#993
Total SSA Count
260
Syllables
3
Formality
Moderate
Nicknames
Harmi, Moni

Playground Safety Score

✓ All Clear
Full profile for Harmoni →

Kai

Boy #76 Most Popular 1 Syllable

Meaning

"sea"

Origin: Hawaiian

Cultural Roots

Hawaiian Scandinavian Japanese American Chinese

Quick Stats

Popularity Rank
#76
Total SSA Count
4,276
Syllables
1
Formality
Casual

Playground Safety Score

✓ All Clear
Full profile for Kai →

Popularity Comparison

Harmoni Rank #993
Kai Rank #76

Kai is more popular, ranked #76 vs #993 for Harmoni.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Harmoni ___

  • Harmoni Rose
  • Harmoni Grace
  • Harmoni Jade
  • Harmoni Sky
  • Harmoni Faith
  • Harmoni Reign

Kai ___

  • Kai James
  • Kai Alexander
  • Kai Michael
  • Kai Robert
  • Kai William
  • Kai Thomas

Sibling Name Ideas

Names that pair well as siblings.

If you choose Harmoni

Melody Cadence Serenity Lyric Bliss

If you choose Kai

Zara Nova Mila Leo Finn

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 Harmoni or Kai more popular?

Kai is more popular, ranked #76 compared to Harmoni at #993 in the United States.

What do Harmoni and Kai mean?

Harmoni means "agreement, concord, fitting together" (Greek origin). Kai means "sea" (Hawaiian origin).

Are Harmoni and Kai boy or girl names?

Harmoni is primarily a girl name. Kai is primarily a boy name.

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← Full profile: Harmoni ← Full profile: Kai Browse all baby names