Casimer
Masculine · “he who commands peace”
A Polish cavalry officer is why this name is in American records at all. He had already been condemned to death at home for a failed rising, came over to fight for the revolution, reorganised a cavalry that barely existed, and was killed at Savannah at thirty-four — and one state still closes its schools for him.
How old is the name Casimer?
Casimer first appears in US birth records in 1895 — 130 years ago. The typical Casimer alive today was born around 1921, making them about 104 years old. About 200 people named Casimer are estimated to be alive in the US today.
When was the name Casimer most popular?
Casimer peaked in 1917, reaching #509 nationally. See the whole 1917 chart.
Lists built from the same records:
Where it comes from
From Kazimierz to Casimer
The story of Casimer
A king of the name is remembered in a single sentence that Poles still quote. He inherited a country that had been fought over and impoverished, spent his reign codifying the laws, founding a university, admitting Jewish refugees expelled from elsewhere in Europe, and building — and the proverb says he found Poland made of wood and left it made of brick. He is the only Polish monarch given the epithet the Great. He also had no legitimate son, which meant the dynasty ended with him and the throne passed by marriage to Lithuania.
Meaningscholars disagree
he who commands peace
Two Slavic elements, the second meaning peace. The first is argued over: destroy and command have both been proposed, which produces two nearly opposite readings of the same compound.
How the name formed
- Kazimierz
- Casimir
- Casimer
Related forms: Kazimierz · Casimir · Kazimieras
Pronouncing Casimer
KAZ-uh-mur
Three syllables with the stress at the front. Polish puts it on the second and pronounces the ending quite differently.
Nicknames for Casimer
Moderate
What the data says
146 years of official birth records
The long climb, and where it stands now
The same years in position rather than babies
- First recorded
- 1895
- Most boys named
- 1918135 — the highest on record
- Peak rank
- #509reached in 1917
- Change vs 2009
- 0.0%5 in 2017, from 5
Rank is a position, a count is a headcount, and they move independently — a name can hold its rank while the number of babies behind it falls. Source: U.S. Social Security Administration.
Casimer in other languages
The same name elsewhere
- Kazimierz in Polish — same name
- Casimir in French — same name
- Kazimieras in Lithuanian — same name
Casimers among us
people named Casimer are estimated to be alive in the US today
Estimated from SSA birth records and published actuarial life tables. Method
Is it right for you
Questions parents actually ask
Fashion outlook
Casimer sits outside the current charts, and that is its own kind of answer: naming cycles can only date the names they carried up. A name this rare has no decade stamped on it — it cannot go out of fashion, because it was never in.
Based on 146 years of naming cycles. How we read them
The trade-off
- Kaz works as a short form and sounds entirely current.
- It carries a specific and identifiable history rather than a vague one.
- It is genuinely rare while containing no difficult sound.
- Casimir is the standard spelling and this one gets corrected.
- The meaning is genuinely contested between two opposite readings.
- The generation that used it in America is now very old.
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Casimer
Masculine
Frequently asked
- How many Casimers are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 200 people named Casimer are estimated to be alive in the US today.
- How popular is the name Casimer in 2025?
- Casimer is rarely given in the US today — it does not rank in the top 2000 boy names.
- Will my child share the name Casimer with classmates?
- Casimer will almost certainly be the only one in school.
More C names
The most-given names starting with C, all years combined.
Charles#48 · Christopher#68 · Carl#1132 · Christian#96 · Caleb#58 · Cameron#76 · Carlos#150 · Clarence#1499
Looking for what else is popular rather than what resembles Casimer? See the current top 100.
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US figures from the Social Security Administration. 1880–2025. Data & methodology
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