Kieran vs Cassius

Baby Name Comparison — 2026

Kieran

Boy #441 Most Popular 2 Syllables

"little dark one"

Origin: Irish Gaelic (ciar + -án)

Irish Scottish English

✓ All Clear

Boy #568 Most Popular 3 Syllables

"hollow, empty"

Origin: Latin

English American Roman

✓ All Clear

Kieran Rank #441

Cassius Rank #568

Kieran is more popular, ranked #441 vs #568 for Cassius.

Is Kieran or Cassius more popular?

Kieran is more popular, ranked #441 compared to Cassius at #568 in the United States.

What do Kieran and Cassius mean?

Kieran means "little dark one" (Irish Gaelic (ciar + -án) origin). Cassius means "hollow, empty" (Latin origin).

Are Kieran and Cassius boy or girl names?

Kieran is primarily a boy name. Cassius is primarily a boy name.