Casyn vs Halley

Baby Name Comparison — 2026

Casyn

Boy #4,583 Most Popular 2 Syllables

"vigilant, watchful"

Origin: Irish Gaelic

American Irish English

✓ All Clear

Boy #4,634 Most Popular 2 Syllables

"hay meadow"

Origin: Old English

American English

✓ All Clear

Casyn Rank #4,583

Halley Rank #4,634

Casyn is more popular, ranked #4583 vs #4634 for Halley.

Is Casyn or Halley more popular?

Casyn is more popular, ranked #4583 compared to Halley at #4634 in the United States.

What do Casyn and Halley mean?

Casyn means "vigilant, watchful" (Irish Gaelic origin). Halley means "hay meadow" (Old English origin).

Are Casyn and Halley boy or girl names?

Casyn is primarily a boy name. Halley is primarily a boy name.