Casimir vs Jan

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 →

Jan

Boy #2,213 Most Popular 1 Syllable

Meaning

"God is gracious"

Origin: Hebrew (via Latin Johannes)

Cultural Roots

Dutch Polish Czech Scandinavian German

Quick Stats

Popularity Rank
#2,213
Total SSA Count
65
Syllables
1
Formality
Moderate
Nicknames
Janny

Playground Safety Score

✓ All Clear
Full profile for Jan →

Popularity Comparison

Casimir Rank #2,401
Jan Rank #2,213

Jan is more popular, ranked #2213 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

Jan ___

  • Jan Pieter
  • Jan Henrik
  • Jan Willem
  • Jan Erik
  • Jan Michael
  • Jan Thomas

Sibling Name Ideas

Names that pair well as siblings.

If you choose Casimir

Leopold Celestine Ambrose Isolde Ottoline

If you choose Jan

Piet Lena Hans Marta Erik

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 Jan more popular?

Jan is more popular, ranked #2213 compared to Casimir at #2401 in the United States.

What do Casimir and Jan mean?

Casimir means "proclaimer of peace" (Old Polish Slavic origin). Jan means "God is gracious" (Hebrew (via Latin Johannes) origin).

Are Casimir and Jan boy or girl names?

Casimir is primarily a boy name. Jan is primarily a boy name.

More Comparisons

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