Casyn vs Denny

Baby Name Comparison — 2026

Casyn

Boy #4,583 Most Popular 2 Syllables

"vigilant, watchful"

Origin: Irish Gaelic

American Irish English

✓ All Clear

Boy #4,471 Most Popular 2 Syllables

"follower of Dionysus (god of wine)"

Origin: Greek via Latin

American English Irish

✓ All Clear

Casyn Rank #4,583

Denny Rank #4,471

Denny is more popular, ranked #4471 vs #4583 for Casyn.

Is Casyn or Denny more popular?

Denny is more popular, ranked #4471 compared to Casyn at #4583 in the United States.

What do Casyn and Denny mean?

Casyn means "vigilant, watchful" (Irish Gaelic origin). Denny means "follower of Dionysus (god of wine)" (Greek via Latin origin).

Are Casyn and Denny boy or girl names?

Casyn is primarily a boy name. Denny is primarily a boy name.