Sullivan vs Alex

Baby Name Comparison — 2026

Sullivan

Boy #340 Most Popular 3 Syllables

"descendant of the dark one"

Origin: Irish Gaelic

Irish American English

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Boy #205 Most Popular 2 Syllables

"defender of men"

Origin: Greek

English Greek Spanish Russian French

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Sullivan Rank #340

Alex Rank #205

Alex is more popular, ranked #205 vs #340 for Sullivan.

Is Sullivan or Alex more popular?

Alex is more popular, ranked #205 compared to Sullivan at #340 in the United States.

What do Sullivan and Alex mean?

Sullivan means "descendant of the dark one" (Irish Gaelic origin). Alex means "defender of men" (Greek origin).

Are Sullivan and Alex boy or girl names?

Sullivan is primarily a boy name. Alex is primarily a boy name.