Kieran vs Cassian

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 #617 Most Popular 3 Syllables

"of the Cassian family (Roman gens)"

Origin: Latin

English American European

✓ All Clear

Kieran Rank #441

Cassian Rank #617

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

Is Kieran or Cassian more popular?

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

What do Kieran and Cassian mean?

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

Are Kieran and Cassian boy or girl names?

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