Alastair vs Liam

Baby Name Comparison — 2026

Alastair

Boy #2,390 Most Popular 3 Syllables

Meaning

"defender of men"

Origin: Greek via Scottish Gaelic

Cultural Roots

Scottish Irish British American

Quick Stats

Popularity Rank
#2,390
Total SSA Count
59
Syllables
3
Formality
Formal
Nicknames
Al, Ali, Allie

Playground Safety Score

✓ All Clear
Full profile for Alastair →

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

Alastair Rank #2,390
Liam Rank #1

Liam is more popular, ranked #1 vs #2390 for Alastair.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Alastair ___

  • Alastair James
  • Alastair Hugh
  • Alastair Gordon
  • Alastair Fraser
  • Alastair David
  • Alastair Colin

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 Alastair

Catriona Fiona Hamish Angus Isla

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 Alastair or Liam more popular?

Liam is more popular, ranked #1 compared to Alastair at #2390 in the United States.

What do Alastair and Liam mean?

Alastair means "defender of men" (Greek via Scottish Gaelic origin). Liam means "strong-willed warrior" (Irish origin).

Are Alastair and Liam boy or girl names?

Alastair is primarily a boy name. Liam is primarily a boy name.

More Comparisons

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