Kieran vs Sullivan

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 #340 Most Popular 3 Syllables

"descendant of the dark one"

Origin: Irish Gaelic

Irish American English

✓ All Clear

Kieran Rank #441

Sullivan Rank #340

Sullivan is more popular, ranked #340 vs #441 for Kieran.

Is Kieran or Sullivan more popular?

Sullivan is more popular, ranked #340 compared to Kieran at #441 in the United States.

What do Kieran and Sullivan mean?

Kieran means "little dark one" (Irish Gaelic (ciar + -án) origin). Sullivan means "descendant of the dark one" (Irish Gaelic origin).

Are Kieran and Sullivan boy or girl names?

Kieran is primarily a boy name. Sullivan is primarily a boy name.