Justin vs Kai

Baby Name Comparison — 2026

Justin

Boy #199 Most Popular 2 Syllables

Meaning

"just, righteous"

Origin: Latin

Cultural Roots

English American French Scandinavian

Quick Stats

Popularity Rank
#199
Total SSA Count
1,788
Syllables
2
Formality
Moderate
Nicknames
Jus

Playground Safety Score

✓ All Clear
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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

Justin Rank #199
Kai Rank #76

Kai is more popular, ranked #76 vs #199 for Justin.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Justin ___

  • Justin James
  • Justin Michael
  • Justin Alexander
  • Justin Lee
  • Justin Ryan
  • Justin Thomas

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 Justin

Brandon Tyler Brittany Ashley Ryan

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 Justin or Kai more popular?

Kai is more popular, ranked #76 compared to Justin at #199 in the United States.

What do Justin and Kai mean?

Justin means "just, righteous" (Latin origin). Kai means "sea" (Hawaiian origin).

Are Justin and Kai boy or girl names?

Justin is primarily a boy name. Kai is primarily a boy name.

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