Gregory vs Killian

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 #370 Most Popular 3 Syllables

"associated with the church"

Origin: Irish Gaelic

Irish French American English

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Gregory Rank #538

Killian Rank #370

Killian is more popular, ranked #370 vs #538 for Gregory.

Is Gregory or Killian more popular?

Killian is more popular, ranked #370 compared to Gregory at #538 in the United States.

What do Gregory and Killian mean?

Gregory means "watchful, vigilant, alert" (Greek origin). Killian means "associated with the church" (Irish Gaelic origin).

Are Gregory and Killian boy or girl names?

Gregory is primarily a boy name. Killian is primarily a boy name.