Cassidy vs Cassius

Baby Name Comparison — 2026

Cassidy

Boy #2,323 Most Popular 3 Syllables

"curly-haired"

Origin: Irish Gaelic

Irish American English

✓ All Clear

Boy #568 Most Popular 3 Syllables

"hollow, empty"

Origin: Latin

English American Roman

✓ All Clear

Cassidy Rank #2,323

Cassius Rank #568

Cassius is more popular, ranked #568 vs #2323 for Cassidy.

Is Cassidy or Cassius more popular?

Cassius is more popular, ranked #568 compared to Cassidy at #2323 in the United States.

What do Cassidy and Cassius mean?

Cassidy means "curly-haired" (Irish Gaelic origin). Cassius means "hollow, empty" (Latin origin).

Are Cassidy and Cassius boy or girl names?

Cassidy is primarily a boy name. Cassius is primarily a boy name.