Casyn vs Jamarius

Baby Name Comparison — 2026

Casyn

Boy #4,583 Most Popular 2 Syllables

"vigilant, watchful"

Origin: Irish Gaelic

American Irish English

✓ All Clear

Boy #4,676 Most Popular 4 Syllables

"supplanter (James element)"

Origin: Hebrew via Latin

African American American

✓ All Clear

Casyn Rank #4,583

Jamarius Rank #4,676

Casyn is more popular, ranked #4583 vs #4676 for Jamarius.

Is Casyn or Jamarius more popular?

Casyn is more popular, ranked #4583 compared to Jamarius at #4676 in the United States.

What do Casyn and Jamarius mean?

Casyn means "vigilant, watchful" (Irish Gaelic origin). Jamarius means "supplanter (James element)" (Hebrew via Latin origin).

Are Casyn and Jamarius boy or girl names?

Casyn is primarily a boy name. Jamarius is primarily a boy name.