Killian vs Jeffrey

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 #521 Most Popular 3 Syllables

"pledge of peace"

Origin: Germanic

English American French

✓ All Clear

Killian Rank #370

Jeffrey Rank #521

Killian is more popular, ranked #370 vs #521 for Jeffrey.

Is Killian or Jeffrey more popular?

Killian is more popular, ranked #370 compared to Jeffrey at #521 in the United States.

What do Killian and Jeffrey mean?

Killian means "associated with the church" (Irish Gaelic origin). Jeffrey means "pledge of peace" (Germanic origin).

Are Killian and Jeffrey boy or girl names?

Killian is primarily a boy name. Jeffrey is primarily a boy name.