Brennan vs Liam

Baby Name Comparison — 2026

Brennan

Boy #1,058 Most Popular 2 Syllables

Meaning

"descendant of Braonán, tearful one"

Origin: Irish Gaelic

Cultural Roots

Irish American Scottish

Quick Stats

Popularity Rank
#1,058
Total SSA Count
207
Syllables
2
Formality
Moderate
Nicknames
Bren, Benny

Playground Safety Score

✓ All Clear
Full profile for Brennan →

Liam

Boy #1 Most Popular 2 Syllables

Meaning

"strong-willed warrior"

Origin: Irish

Cultural Roots

Irish English American

Quick Stats

Popularity Rank
#1
Total SSA Count
22,164
Syllables
2
Formality
Moderate
Nicknames
Lee

Playground Safety Score

✓ All Clear
Full profile for Liam →

Popularity Comparison

Brennan Rank #1,058
Liam Rank #1

Liam is more popular, ranked #1 vs #1058 for Brennan.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Brennan ___

  • Brennan Patrick
  • Brennan James
  • Brennan Michael
  • Brennan Thomas
  • Brennan Sean
  • Brennan Finn

Liam ___

  • Liam James
  • Liam Alexander
  • Liam Thomas
  • Liam Michael
  • Liam Patrick
  • Liam Joseph

Sibling Name Ideas

Names that pair well as siblings.

If you choose Brennan

Declan Ronan Callum Fionn Niamh

If you choose Liam

Olivia Emma Noah Charlotte Sophia

Which Name Fits Your Family?

Answer 3 quick questions and we'll help you decide.

1. Which style feels more like your family?

Frequently Asked Questions

Is Brennan or Liam more popular?

Liam is more popular, ranked #1 compared to Brennan at #1058 in the United States.

What do Brennan and Liam mean?

Brennan means "descendant of Braonán, tearful one" (Irish Gaelic origin). Liam means "strong-willed warrior" (Irish origin).

Are Brennan and Liam boy or girl names?

Brennan is primarily a boy name. Liam is primarily a boy name.

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← Full profile: Brennan ← Full profile: Liam Browse all baby names