Billy vs Brennan

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 #1,058 Most Popular 2 Syllables

"descendant of Braonán, tearful one"

Origin: Irish Gaelic

Irish American Scottish

✓ All Clear

Billy Rank #1,051

Brennan Rank #1,058

Billy is more popular, ranked #1051 vs #1058 for Brennan.

Is Billy or Brennan more popular?

Billy is more popular, ranked #1051 compared to Brennan at #1058 in the United States.

What do Billy and Brennan mean?

Billy means "resolute protector" (Old German via Norman French origin). Brennan means "descendant of Braonán, tearful one" (Irish Gaelic origin).

Are Billy and Brennan boy or girl names?

Billy is primarily a boy name. Brennan is primarily a boy name.