Sullivan vs Gregory

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 #538 Most Popular 3 Syllables

"watchful, vigilant, alert"

Origin: Greek

English Greek Roman Catholic Eastern Orthodox

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Sullivan Rank #340

Gregory Rank #538

Sullivan is more popular, ranked #340 vs #538 for Gregory.

Is Sullivan or Gregory more popular?

Sullivan is more popular, ranked #340 compared to Gregory at #538 in the United States.

What do Sullivan and Gregory mean?

Sullivan means "descendant of the dark one" (Irish Gaelic origin). Gregory means "watchful, vigilant, alert" (Greek origin).

Are Sullivan and Gregory boy or girl names?

Sullivan is primarily a boy name. Gregory is primarily a boy name.