Killian vs Cillian

Baby Name Comparison — 2026

Killian

Boy #370 Most Popular 3 Syllables

"associated with the church"

Origin: Irish Gaelic

Irish French American English

✓ All Clear

Boy #464 Most Popular 3 Syllables

"strife, war"

Origin: Old Irish

Irish Celtic

✓ All Clear

Killian Rank #370

Cillian Rank #464

Killian is more popular, ranked #370 vs #464 for Cillian.

Is Killian or Cillian more popular?

Killian is more popular, ranked #370 compared to Cillian at #464 in the United States.

What do Killian and Cillian mean?

Killian means "associated with the church" (Irish Gaelic origin). Cillian means "strife, war" (Old Irish origin).

Are Killian and Cillian boy or girl names?

Killian is primarily a boy name. Cillian is primarily a boy name.