Cass vs Liam

Baby Name Comparison — 2026

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

Cass Rank #5,414
Liam Rank #1

Liam is more popular, ranked #1 vs #5414 for Cass.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Cass ___

  • Cass River
  • Cass James
  • Cass Elliott
  • Cass Monroe
  • Cass Theodore
  • Cass August

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 Cass

Juno Wren Beau Quinn Milo

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 Cass or Liam more popular?

Liam is more popular, ranked #1 compared to Cass at #5414 in the United States.

What do Cass and Liam mean?

Cass means "hollow, vain (from Latin Cassius)" (Latin origin). Liam means "strong-willed warrior" (Irish origin).

Are Cass and Liam boy or girl names?

Cass is primarily a boy name. Liam is primarily a boy name.

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