Casimiro
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Meaning
proclaimer of peace; a classic Spain name sharing its root with the Polish Kazimierz
How popular is Casimiro around the world?
In the United States, 27 babies were named Casimiro between 2020 and 2025. In Spain, 3,344 residents are named Casimiro, the 564th most common name among men, with a mean age of 68.9 years.
Casimiro is on the official records of the United States, Spain and Brazil.
United States
1 in 810,000
In the United States, 27 babies were named Casimiro between 2020 and 2025.
Shape drawn from US Social Security baby-name records. Casimiro has stayed rare in US records the whole time: no peak decade to name.
Births with a Social Security record. Source: U.S. Social Security Administration
Spain
1 in 13,000
In Spain, 3,344 residents are named Casimiro, the 564th most common name among men, with a mean age of 68.9 years.
Residents of Spain on 1 January 2025. Spain publishes how old a name’s living bearers are, not a birth series, so there is no year chart. Source: INE (Spain), Censo de Población anual, 1 January 2025
Brazil
1 in 200,000
At the 2022 census, 1,033 people in Brazil were named Casimiro, ranked 8,102nd, with a median age of 64.
Among people named Casimiro living in Brazil at the 2022 census, more were born in the 1950s than in any other decade.
people alive at the 2022 census, by decade of birth
People alive and resident in Brazil at the 2022 census, a living-population count, not births; names under 20 are withheld at source. Source: IBGE, Censo Demográfico 2022
Argentina
last on record 2023
Casimiro is not on the 2024 record for Argentina, where small counts are withheld at source.
The count never rose above 7 in a year, too few to chart.
Given-name components of births in Argentina 2012–2024; national cells are lower bounds and no sex split is published. Source: RENAPER (Argentina), Dirección Nacional de Población, given names 2012-2024
Chile
last on record 2016
Casimiro is not on the 2021 record for Chile, where nametree keeps the spellings that reached 5 registrations in some year.
share of that year’s name registrations
First-name registrations with Chile’s civil registry by year of registration, 1920–2021, counted as spelling groups (Sofía, Sofia and Sofìa are one name, shown with its most-registered spelling); the registry withholds nothing, nametree keeps the groups that reached 5 registrations in some year, and shares divide by every registration of the year. Source: Servicio de Registro Civil e Identificación (Chile) via the guaguas package, first-name registrations 1920-2021
Montevideo City
last on record 1976
Casimiro is not on the 2011 record for Montevideo, whose registry withholds nothing, so the spelling was not given there that year.
The count never rose above 3 in a year, too few to chart.
Births in the department of Montevideo (not all of Uruguay) by first name and year of birth, 1940–2011, from the city’s civil registry, which writes names in capitals, almost always without accents; counted as spelling groups (accent and punctuation variants merged), nothing is withheld at source, and 2012 is excluded as a partial year. Source: Servicio de Registro Civil, Intendencia de Montevideo, Partidas de Registro Civil de Montevideo (Licencia de Datos Abiertos - Uruguay); 2012 dropped as partial
Not on the record in Mexico City, Puerto Rico, England and Wales, Canada, Ireland, New Zealand, Scotland and Poland: those registries withhold small counts, so rare uses may sit below their floors.
Not on the France record: nametree keeps spellings that reached 20 births in some year, so rarer uses are not shown. Not on the South Australia record for 1944 to 2017: that registry withholds nothing, so this spelling was not given there in those years. Not on the Austria record for 1984 to 2025: Statistik Austria publishes every first name down to a single birth, so this name was not given there in those years (before 2010 the record covers babies with Austrian citizenship only). Not on Norway’s list: Statistics Norway lists only first names carried by 200 or more living people, so rarer names are not shown.
When you meet Casimiro
People given the name Casimiro in the United States span the generations: the middle half were born anywhere from 1950 to 1999. Age is the one thing the name won't tell you.
Estimated from US Social Security birth registrations and typical lifespans; a rough guide, not a rule.
Keep exploring
The Casimiro deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Casimiro truly comes from, how it traveled, and what a century of records reveals. If you have grown a tree on nametree, it also considers how Casimiro fits with your family’s names and surname.
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