Casey vs Kai

Baby Name Comparison — 2026

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

Casey Rank #310
Kai Rank #76

Kai is more popular, ranked #76 vs #310 for Casey.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Casey ___

  • Casey Casey James
  • Casey Casey Alexander
  • Casey Casey Thomas
  • Casey Casey Michael
  • Casey Casey Owen

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 Casey

Riley Logan Peyton Avery Quinn

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 Casey or Kai more popular?

Kai is more popular, ranked #76 compared to Casey at #310 in the United States.

What do Casey and Kai mean?

Kai means "sea" (Hawaiian origin).

Are Casey and Kai boy or girl names?

Casey is primarily a boy name. Kai is primarily a boy name.

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