Killian vs Sonny

Baby Name Comparison — 2026

Killian

Boy #370 Most Popular 3 Syllables

"associated with the church"

Origin: Irish Gaelic

Irish French American English

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Boy #336 Most Popular 2 Syllables

"son, young boy"

Origin: English

American English Italian-American

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Killian Rank #370

Sonny Rank #336

Sonny is more popular, ranked #336 vs #370 for Killian.

Is Killian or Sonny more popular?

Sonny is more popular, ranked #336 compared to Killian at #370 in the United States.

What do Killian and Sonny mean?

Killian means "associated with the church" (Irish Gaelic origin). Sonny means "son, young boy" (English origin).

Are Killian and Sonny boy or girl names?

Killian is primarily a boy name. Sonny is primarily a boy name.