Casyn vs Keylan

Baby Name Comparison — 2026

Casyn

Boy #4,583 Most Popular 2 Syllables

"vigilant, watchful"

Origin: Irish Gaelic

American Irish English

✓ All Clear

Boy #4,690 Most Popular 2 Syllables

"slender, narrow"

Origin: Irish Gaelic

Irish American English

✓ All Clear

Casyn Rank #4,583

Keylan Rank #4,690

Casyn is more popular, ranked #4583 vs #4690 for Keylan.

Is Casyn or Keylan more popular?

Casyn is more popular, ranked #4583 compared to Keylan at #4690 in the United States.

What do Casyn and Keylan mean?

Casyn means "vigilant, watchful" (Irish Gaelic origin). Keylan means "slender, narrow" (Irish Gaelic origin).

Are Casyn and Keylan boy or girl names?

Casyn is primarily a boy name. Keylan is primarily a boy name.