Sullivan vs Cillian

Baby Name Comparison — 2026

Sullivan

Boy #340 Most Popular 3 Syllables

"descendant of the dark one"

Origin: Irish Gaelic

Irish American English

✓ All Clear

Boy #464 Most Popular 3 Syllables

"strife, war"

Origin: Old Irish

Irish Celtic

✓ All Clear

Sullivan Rank #340

Cillian Rank #464

Sullivan is more popular, ranked #340 vs #464 for Cillian.

Is Sullivan or Cillian more popular?

Sullivan is more popular, ranked #340 compared to Cillian at #464 in the United States.

What do Sullivan and Cillian mean?

Sullivan means "descendant of the dark one" (Irish Gaelic origin). Cillian means "strife, war" (Old Irish origin).

Are Sullivan and Cillian boy or girl names?

Sullivan is primarily a boy name. Cillian is primarily a boy name.