Justo
Torn between Justo and another name? Compare them side by side →
Meaning
the Spanish form of Justus
How popular is Justo around the world?
In the United States, 63 babies were named Justo between 2020 and 2025. In Spain, 9,168 residents are named Justo, the 283rd most common name among men, with a mean age of 64.7 years.
Justo is on the official records of the United States, Spain, Argentina and Chile.
United States
1 in 350,000
In the United States, 63 babies were named Justo between 2020 and 2025.
Shape drawn from US Social Security baby-name records. Justo 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 4,900
In Spain, 9,168 residents are named Justo, the 283rd most common name among men, with a mean age of 64.7 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
Argentina
1 in 8,200
In Argentina, 81 newborns were given the name Justo in 2024.
share of that year’s name registrations
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
1 in 180,000
In Chile, 1 boy was registered as Justo in 2021, every accent spelling counted together.
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
Mexico City City
last on record 2021
Justo is not on the 2022 record for Mexico City, where small counts are withheld at source.
The count never rose above 3 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 2009
Justo 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 7 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
Puerto Rico
last on record 2001
Justo is not on the 2025 record for Puerto Rico, which withholds births under 5, and 5 babies have carried the name there since 1998.
The count never rose above 5 in a year, too few to chart.
First given name only, from Social Security records of births in Puerto Rico; any name-sex-year under 5 births is withheld at source. Shares divide by the Puerto Rico Demographic Registry’s count of births on the island; the 2025 count is provisional. Source: U.S. Social Security Administration, territory name file (Puerto Rico)
Not on the record in 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 Justo
Most people given the name Justo in the United States were born between 1960 and 2009. The Justo you meet today is most often in his 30s or 40s.
Estimated from US Social Security birth registrations and typical lifespans; a rough guide, not a rule.
The Justo deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Justo 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 Justo fits with your family’s names and surname.
Does Justo fit YOUR family?
nametree reads your family’s names and finds the ones that belong. Free, private, no ads.
Add Justo to your family’s tree →