Casimir vs Oliver

Baby Name Comparison — 2026

Casimir

Boy #2,401 Most Popular 3 Syllables

Meaning

"proclaimer of peace"

Origin: Old Polish Slavic

Cultural Roots

Polish Czech Lithuanian French Catholic

Quick Stats

Popularity Rank
#2,401
Total SSA Count
58
Syllables
3
Formality
Formal
Nicknames
Cas, Caz, Cassi

Playground Safety Score

✓ All Clear
Full profile for Casimir →

Popularity Comparison

Casimir Rank #2,401
Oliver Rank #3

Oliver is more popular, ranked #3 vs #2401 for Casimir.

Popularity Over Time

Historical US popularity rank — lower number means more popular.

Middle Name Pairings

Casimir ___

  • Casimir James
  • Casimir Anthony
  • Casimir John
  • Casimir Louis
  • Casimir Edmund
  • Casimir Felix

Oliver ___

  • Oliver James
  • Oliver Thomas
  • Oliver William
  • Oliver Henry
  • Oliver John
  • Oliver Benjamin

Sibling Name Ideas

Names that pair well as siblings.

If you choose Casimir

Leopold Celestine Ambrose Isolde Ottoline

If you choose Oliver

Olivia Charlotte Emma Sophia Amelia

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 Casimir or Oliver more popular?

Oliver is more popular, ranked #3 compared to Casimir at #2401 in the United States.

What do Casimir and Oliver mean?

Casimir means "proclaimer of peace" (Old Polish Slavic origin). Oliver means "olive tree" (Latin origin).

Are Casimir and Oliver boy or girl names?

Casimir is primarily a boy name. Oliver is primarily a boy name.

More Comparisons

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← Full profile: Casimir ← Full profile: Oliver Browse all baby names