"proclaimer of peace"
Origin: Old Polish Slavic
Language: English
Casimir
Pronunciation: [ k-AS-ihm-eer ]
Does Casimir flow with your last name?
A Polish royal name carrying centuries of saintly heritage
Polish
Czech
Lithuanian
French
Catholic
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Meaning & Origin
"destroyer of peace (literal)"
Origin: Slavic kazić + mir
Language: English
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The Story of Casimir
Casimir comes from the Old Polish 'Kazimierz,' composed of 'kazić' (to destroy, disturb) and 'mir' (peace, world) — literally 'destroyer of peace,' though it was understood as 'proclaimer of peace' or 'enforcer of peace' in medieval context. This paradox reflects how these Slavic 'mir' names often described a powerful upholder of social order. The name became famous through the Polish royals who bore it, including Saint Casimir of Poland.
Casimir is gaining traction among parents seeking genuinely rare, historically substantial names. The trend toward elaborate, old-world names (Maximilian, Cornelius, Archibald) has brought Casimir within reach as an adventurous but defensible choice, particularly in families with Polish or Catholic heritage.
Saint Casimir (1458-1484) is the patron saint of Poland and Lithuania, celebrated on March 4th. Prince Casimir refused to wage war against Hungary on his father's orders, preferring prayer and fasting — turning the name's paradoxical meaning into a story of saintly pacifism. He is one of the most venerated saints in Eastern Europe.
Historical Record
Casimir first appeared in US Social Security records in 1950.
Over 1,480 babies have been named Casimir in the United States since SSA records began.
Today, Casimir is rising quickly in popularity , currently ranked #2,401 for boy names in the US .
Fun Facts
- Saint Casimir of Poland is the only royal saint of the Polish nation and is celebrated as patron of youth and Poland
- The French used Casimir as a surname — including Casimir Périer, Prime Minister of France in 1831
Casimir in Other Languages
Czech
Kazimír
Latin
Casimirus
French
Casimir
Polish
Kazimierz
Lithuanian
Kazimieras
Popularity Over Time
#2,401
Current Rank
Rising
Trend
Rising Fast
Based on SSA data 1880–present
Year-by-year popularity data will be available soon.
Famous People Named Casimir
C
Casimir Funk
Scientist
1884
Polish-American biochemist who coined the word 'vitamin' and pioneered the science of vitamins and nutrition
C
Casimir Pulaski
Military
1745
Polish military commander who became a hero of the American Revolutionary War and is considered one of the fathers of Am...
Polish military commander who became a hero of the American Revolutionary War and is considered one of the fathers of American cavalry
S
Saint Casimir of Poland
Religious
1458
Prince of Poland who became a saint for his piety and refusal to wage unjust war; patron saint of Poland and Lithuania
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See all →Quick Facts
- Gender
- Boy
- Syllables
- 3
- Popularity Rank
- #2,401
- Total SSA Count
- 58
- Cultural Origins
- Polish Czech Lithuanian French Catholic
- Pronunciation
- Moderate
- Formality
- Formal
- Cross-Cultural Ease
- Moderate
Common Nicknames
Cas
Caz
Cassi
Middle Name Ideas
Suggested pairings based on syllable flow and style
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Timeless choice, smooth 3-1 syllable flow
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Timeless choice, smooth 3-1 syllable flow
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Timeless choice, smooth 3-1 syllable flow
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Timeless choice, smooth 3-1 syllable flow
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Timeless choice, smooth 3-1 syllable flow
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Timeless choice, smooth 3-1 syllable flow
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Timeless choice, smooth 3-1 syllable flow
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Timeless choice, smooth 3-1 syllable flow
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Classic pairing, French heritage match, balanced 3-2 syllable flow
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Distinctive pick, smooth 3-1 syllable flow
Middle Names
Middle Names for Casimir
7 name pairings with syllable flow tips
Sibling Names
Sibling Match
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Frequently Asked Questions About Casimir
What does the name Casimir mean?
"proclaimer of peace" (from Old Polish Slavic). "destroyer of peace (literal)" (from Slavic kazić + mir). Casimir comes from the Old Polish 'Kazimierz,' composed of 'kazić' (to destroy, disturb) and 'mir' (peace, world) — literally 'destroyer of peace,' though it was understood as 'proclaimer of peace' or 'enforcer of peace' in medieval context. This paradox reflects how these Slavic 'mir' names often described a powerful upholder of social order. The name became famous through the Polish royals who bore it, including Saint Casimir of Poland.
What is the origin of the name Casimir?
Casimir has Old Polish Slavic, Slavic kazić + mir, Polish, Czech, Lithuanian, French, and Catholic origins. In Old Polish Slavic, it means "proclaimer of peace". In Slavic kazić + mir, it means "destroyer of peace (literal)".
Is Casimir a boy or girl name?
Casimir is primarily used as a boy name.
How do you pronounce Casimir?
Casimir is pronounced k-AS-ihm-eer.
How popular is the name Casimir?
Casimir is currently ranked #2401 in popularity for boy names in the United States.
What are common nicknames for Casimir?
Common nicknames for Casimir include Cas, Caz, and Cassi.
What are good middle names for Casimir?
Popular middle name pairings include Casimir James, Casimir Anthony, Casimir John, Casimir Louis, Casimir Edmund, Casimir Felix, and Casimir August.
What are good sibling names for Casimir?
Names that pair well with Casimir as siblings include Leopold, Celestine, Ambrose, Isolde, Ottoline, Florian, and Vivienne.
How many syllables does Casimir have?
Casimir has 3 syllables, making it distinctive and rhythmic.
Is Casimir a common or rare name?
Casimir is an uncommon name, ranked #2401 in the US. Its rarity gives it a distinctive, memorable quality.
About the Name Casimir
Casimir is a boy name with Polish, Czech, Lithuanian, French, and Catholic origins . The name means "proclaimer of peace" in Old Polish Slavic .
Casimir is currently ranked #2,401 in popularity for boy names in the United States.
The name Casimir has 3 syllables and is pronounced k-AS-ihm-eer, making it distinctive and memorable.
Common nicknames for Casimir include Cas, Caz, and Cassi. These shorter forms provide casual alternatives while keeping the elegance of the full name.
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Sources
- U.S. Social Security Administration — National Baby Names Data (popularity rankings and historical trends)
- Behind the Name (etymology and meaning research)
- NamingEverything editorial research and analysis