Given name & surname
Casimiro
“one who demands peace”
Casimiro is a variant of Casimir. One Slavic interpretation is “one who demands peace.”
Original PolishKazimierz
Meaning & origin
What it means
Casimiro is a variant of Casimir. One Slavic interpretation is “one who demands peace.”
Explained through its name family
The story
Published U.S. birth records include this spelling as early as 1881. This is the earliest published observation available here, rather than a date for the name’s origin.
From dated birth records
Casimiro through the years
- Babies since 1880
- 1,084
- 1,084 boys · 0 girls
- Most popular year
- 1921
- 28 babies
- 2025
- 6
- #10,908 for boys
- 2021–25 vs 2016–20
- 0%
- Steady
By the numbers
In 2025, this name appeared in 6 U.S. birth records for boys, ranking No. 10,908 among boys’ names. The recent annual counts are too incomplete to establish a ten-year comparison. Its largest published annual count for boys was 28 in 1921. Published U.S. population figures for this spelling include 1,783 as a first name in 2020; 2,076 as a surname in 2020.
From Social Security birth records and U.S. Census name counts for this exact spelling. Other spellings are counted separately.
Casimiro’s family of names
In Spanish usage, Casimiro has a conventional equivalent in the Polish form Kazimierz. Casimiro has a related form in Casimir. In Spanish usage, Casimiro has a conventional equivalent in the English form Casimir.
Inner ring: spellings · middle: nicknames and forms · outer: across languages.
Around the world
Casimiro has relatives in 5 languages. Lines run from its Polish roots to each of them.
Polishwhere Casimiro comes from · 1 name
Nicknames & forms 4
Diminutives, pet forms, short forms and variants used alongside the name.
Spellings & scripts 2
The same name written differently, including transliterations into other scripts.
Across languages 7
Equivalents and cognates in other languages, plus older forms it grew from.
People named Casimiro
- Casimiro TorresChilean footballer1905–1977
- Casimiro de AbreuBrazilian poet, novelist and playwright (1839–1860)
- Casimiro GennariCatholic cardinal (1839-1914)
- Casimiro Gómez OrtegaSpanish botanist (1741-1818)
- Casimiro López LlorenteSpanish bishopborn 1950
- Casimiro Morcillo GonzálezSpanish catholic priest (1904-1971)
- Casimiro de OliveiraPortuguese racing driver (1907–1970)
- Casimiro Montenegro FilhoBrazilian general1904–2000
- Casimiro MonteiroPortuguese intelligence officer and assasin1920–1993
Listed by how widely each person is written about, which says nothing about the name itself.
Similar names
If you love Casimiro, these share its style, era, origin or sound, from outside its own family.
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Kapuscinský is a surname from Polish. It is used in Slovak.
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Kalinoski
Kalinoski is a surname from Polish.
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