Gregory vs Sullivan

Baby Name Comparison — 2026

Gregory

Boy #538 Most Popular 3 Syllables

"watchful, vigilant, alert"

Origin: Greek

English Greek Roman Catholic Eastern Orthodox

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Boy #340 Most Popular 3 Syllables

"descendant of the dark one"

Origin: Irish Gaelic

Irish American English

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Gregory Rank #538

Sullivan Rank #340

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

Is Gregory or Sullivan more popular?

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

What do Gregory and Sullivan mean?

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

Are Gregory and Sullivan boy or girl names?

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