Cassian vs Kieran

Baby Name Comparison — 2026

Cassian

Boy #617 Most Popular 3 Syllables

"of the Cassian family (Roman gens)"

Origin: Latin

English American European

✓ All Clear

Boy #441 Most Popular 2 Syllables

"little dark one"

Origin: Irish Gaelic (ciar + -án)

Irish Scottish English

✓ All Clear

Cassian Rank #617

Kieran Rank #441

Kieran is more popular, ranked #441 vs #617 for Cassian.

Is Cassian or Kieran more popular?

Kieran is more popular, ranked #441 compared to Cassian at #617 in the United States.

What do Cassian and Kieran mean?

Cassian means "of the Cassian family (Roman gens)" (Latin origin). Kieran means "little dark one" (Irish Gaelic (ciar + -án) origin).

Are Cassian and Kieran boy or girl names?

Cassian is primarily a boy name. Kieran is primarily a boy name.