Brennan vs Dillon

Baby Name Comparison — 2026

Brennan

Boy #1,058 Most Popular 2 Syllables

"descendant of Braonán, tearful one"

Origin: Irish Gaelic

Irish American Scottish

✓ All Clear

Boy #870 Most Popular 2 Syllables

"great tide, son of the sea"

Origin: Welsh

Irish Welsh American English

✓ All Clear

Brennan Rank #1,058

Dillon Rank #870

Dillon is more popular, ranked #870 vs #1058 for Brennan.

Is Brennan or Dillon more popular?

Dillon is more popular, ranked #870 compared to Brennan at #1058 in the United States.

What do Brennan and Dillon mean?

Brennan means "descendant of Braonán, tearful one" (Irish Gaelic origin). Dillon means "great tide, son of the sea" (Welsh origin).

Are Brennan and Dillon boy or girl names?

Brennan is primarily a boy name. Dillon is primarily a boy name.