Brennan vs Grey

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 #878 Most Popular 1 Syllable

"gray-haired one"

Origin: Old English

English American Australian

✓ All Clear

Brennan Rank #1,058

Grey Rank #878

Grey is more popular, ranked #878 vs #1058 for Brennan.

Is Brennan or Grey more popular?

Grey is more popular, ranked #878 compared to Brennan at #1058 in the United States.

What do Brennan and Grey mean?

Brennan means "descendant of Braonán, tearful one" (Irish Gaelic origin). Grey means "gray-haired one" (Old English origin).

Are Brennan and Grey boy or girl names?

Brennan is primarily a boy name. Grey is primarily a boy name.