Casyn vs Aithan

Baby Name Comparison — 2026

Casyn

Boy #4,583 Most Popular 2 Syllables

"vigilant, watchful"

Origin: Irish Gaelic

American Irish English

✓ All Clear

Boy #4,385 Most Popular 2 Syllables

"strong, enduring, firm"

Origin: Hebrew

American Christian English

✓ All Clear

Casyn Rank #4,583

Aithan Rank #4,385

Aithan is more popular, ranked #4385 vs #4583 for Casyn.

Is Casyn or Aithan more popular?

Aithan is more popular, ranked #4385 compared to Casyn at #4583 in the United States.

What do Casyn and Aithan mean?

Casyn means "vigilant, watchful" (Irish Gaelic origin). Aithan means "strong, enduring, firm" (Hebrew origin).

Are Casyn and Aithan boy or girl names?

Casyn is primarily a boy name. Aithan is primarily a boy name.