Billy vs Cullen

Baby Name Comparison — 2026

Billy

Boy #1,051 Most Popular 2 Syllables

"resolute protector"

Origin: Old German via Norman French

English American Australian Irish

✓ All Clear

Boy #1,131 Most Popular 2 Syllables

"at the holly trees"

Origin: Irish Gaelic

Irish Scottish American

✓ All Clear

Billy Rank #1,051

Cullen Rank #1,131

Billy is more popular, ranked #1051 vs #1131 for Cullen.

Is Billy or Cullen more popular?

Billy is more popular, ranked #1051 compared to Cullen at #1131 in the United States.

What do Billy and Cullen mean?

Billy means "resolute protector" (Old German via Norman French origin). Cullen means "at the holly trees" (Irish Gaelic origin).

Are Billy and Cullen boy or girl names?

Billy is primarily a boy name. Cullen is primarily a boy name.