Arnaldo
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Meaning
eagle power (Portuguese form of the German Arnold)
How popular is Arnaldo around the world?
In the United States, 69 babies were named Arnaldo between 2020 and 2025. At the 2022 census, 64,854 people in Brazil were named Arnaldo, the 471st most common name, with a median age of 55.
Arnaldo is on the official records of the United States, Brazil, Argentina, Chile and Spain.
United States
1 in 320,000
In the United States, 69 babies were named Arnaldo between 2020 and 2025.
Shape drawn from US Social Security baby-name records. Arnaldo 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 3,100
At the 2022 census, 64,854 people in Brazil were named Arnaldo, the 471st most common name, with a median age of 55.
Among people named Arnaldo living in Brazil at the 2022 census, more were born in the 1960s than in any other decade.
people alive at the 2022 census, by decade of birth
The census also counted 206 born between 2020 and August 2022, too recent a span to chart. 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
1 in 22,000
In Argentina, 30 newborns were given the name Arnaldo 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 36,000
In Chile, 5 boys were registered as Arnaldo 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
Spain
1 in 58,000
In Spain, 772 residents are named Arnaldo, ranked 1,681st among men, with a mean age of 53.7 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
England and Wales
last on record 2004
Arnaldo is not on the 2025 record for England and Wales, where spellings under 3 in a year are withheld at source.
The count never rose above 3 in a year, too few to chart.
Birth registrations in England and Wales (not the whole UK); exact spellings are counted separately, and any spelling under 3 in a year is withheld at source. Source: Office for National Statistics, baby names in England and Wales
Mexico City City
last on record 2015
Arnaldo 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 2005
Arnaldo 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 6 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 2018
Arnaldo is not on the 2025 record for Puerto Rico, which withholds births under 5, and 400 babies have carried the name there since 1998.
share of that year’s births on record
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)
South Australia
last on record 1997
Arnaldo is not on the 2017 record for South Australia, whose registry publishes every name given that year.
The count never rose above 1 in a year, too few to chart.
Births registered in South Australia (not all of Australia) by first name and year of registration, 1944–2017, from the state’s Births, Deaths and Marriages registry, which publishes every name down to a single birth in capitals; a spelling its export repeats inside a year is counted once, and from 2018 only a top 100 is published, so the series ends at 2017. Source: Consumer and Business Services (South Australia), popular baby names
Not on the record in 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 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 Arnaldo
Most people given the name Arnaldo in the United States were born between 1970 and 1999. The Arnaldo 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.
Keep exploring
The Arnaldo deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Arnaldo 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 Arnaldo fits with your family’s names and surname.
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