Kazuo
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Meaning
harmonious man; an Issei/Nisei-generation given name still found in Brazil's Nikkei community
Goes by Kaz. See all nicknames
How popular is Kazuo around the world?
In the United States, 5 babies were named Kazuo between 2020 and 2025. At the 2022 census, 580 people in Brazil were named Kazuo, ranked 12,091st, with a median age of 72.
Kazuo is on the official records of the United States and Brazil.
United States
1 in 4.4M
In the United States, 5 babies were named Kazuo between 2020 and 2025.
Shape drawn from US Social Security baby-name records. Kazuo 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
Brazil
1 in 330,000
At the 2022 census, 580 people in Brazil were named Kazuo, ranked 12,091st, with a median age of 72.
Among people named Kazuo living in Brazil at the 2022 census, more were born in the 1940s 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 2015
Kazuo is not on the 2024 record for Argentina, where small counts are withheld at source.
The count never rose above 2 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
Mexico City City
last on record 2021
Kazuo is not on the 2022 record for Mexico City, where small counts are withheld at source.
The count never rose above 2 in a year, too few to chart.
Civil-registry acts in Mexico City by registration year. Counts are lower bounds (names under 6 in a month and borough are removed at source) and count name-instances, not people; compound names are split, so “Maria Jose” counts under each part. 2023, a partial extract through 3 Mar with no cell on record for this name, is excluded. Source: Registro Civil of Mexico City, open data portal, registered given names 2000-2023
Montevideo City
last on record 1964
Kazuo 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 1 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 Spain, 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 Chile record: nametree keeps spellings that reached 5 registrations in some year, so rarer uses are not shown. 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 Kazuo
People given the name Kazuo in the United States span the generations: the middle half were born anywhere from 1930 to 2009. 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 Kazuo deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Kazuo 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 Kazuo fits with your family’s names and surname.
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