Killian vs Gregory

Baby Name Comparison — 2026

Killian

Boy #370 Most Popular 3 Syllables

"associated with the church"

Origin: Irish Gaelic

Irish French American English

✓ All Clear

Boy #538 Most Popular 3 Syllables

"watchful, vigilant, alert"

Origin: Greek

English Greek Roman Catholic Eastern Orthodox

✓ All Clear

Killian Rank #370

Gregory Rank #538

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

Is Killian or Gregory more popular?

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

What do Killian and Gregory mean?

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

Are Killian and Gregory boy or girl names?

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