Tadeo
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Meaning
form of Thaddeus, an apostle name of uncertain meaning
The story
In Mexico City, the twenty-eighth of the month brings worshippers back to San Hipólito y San Casiano. They come to thank San Judas Tadeo or ask for his intercession. A calendar date becomes an appointment with hope. Tadeo is the Spanish form of Thaddeus, whose origin remains uncertain. The Gospel lists do not all give the apostle the same name; Christian tradition joins Jude and Thaddaeus in the saint known as San Judas Tadeo. His familiar place in devotion does not make the ancient word any easier to translate. At San Hipólito, that devotion has a visible history inside the building. As it grew, the saint's image was eventually placed on the high altar. The figure people kept coming to see moved into the church's most prominent place.
How popular is Tadeo around the world?
In the United States, 3,571 babies were named Tadeo between 2020 and 2025. In Mexico City, there were 475 registrations of Tadeo in 2022.
Tadeo is on the official records of the United States, Mexico City, Argentina, Montevideo, Chile, Austria, Spain, England and Wales and Brazil.
United States
1 in 6,100
In the United States, 3,571 babies were named Tadeo between 2020 and 2025.
Shape drawn from US Social Security baby-name records. Tadeo peaked in the 2020s.
Births with a Social Security record. Source: U.S. Social Security Administration
Mexico City City
1 in 250
In Mexico City, there were 475 registrations of Tadeo in 2022.
share of that year’s registrations in the city
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 (11 registrations through 3 Mar) is excluded as partial. Source: Registro Civil of Mexico City, open data portal, registered given names 2000-2023
Argentina
1 in 440
In Argentina, 1,505 newborns were given the name Tadeo 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
Montevideo City
1 in 9802011
In Montevideo, 25 boys named Tadeo were born in 2011, spelling variants counted together.
share of that year’s births on record
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
Chile
1 in 3,500
In Chile, 51 boys were registered as Tadeo 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
Austria
1 in 38,000
In Austria, 2 boys named Tadeo were born in 2025, ranked 1,241st among boys that year, spellings that differ only by special characters counted together.
The count never rose above 2 in a year, too few to chart.
Live births in Austria by year of birth, 1984–2025, from Statistik Austria’s first-name statistics; spellings that differ only by special characters are counted together (umlauts stay apart), every name down to a single birth is published, and the count covers babies with Austrian citizenship only until 2009, every baby from 2010, and from 2015 also births abroad to mothers living in Austria. Shares divide by Statistik Austria’s count of live births from 2010, and before that by the file’s own total for the year. Source: Statistik Austria - data.statistik.gv.at (OGDEXT_VORNAMEN_1, updated 2026-07-09)
Spain
1 in 96,000
In Spain, 467 residents are named Tadeo, ranked 2,420th among men, with a mean age of 31.2 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
1 in 150,000
In England and Wales, 4 boys named Tadeo were born in 2025, ranked 4,275th among boys that year.
The count never rose above 4 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
Brazil
1 in 1M
At the 2022 census, 172 people in Brazil were named Tadeo, ranked 28,262nd, with a median age of 46.
Among people named Tadeo living in Brazil at the 2022 census, more were born in the 1970s 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
Canada
last on record 2023
Tadeo is not on the 2024 record for Canada, where names under 5 in a year are excluded at source.
The count never rose above 7 in a year, too few to chart.
First given names from provincial and territorial vital statistics across Canada; any name-sex-year under 5 is excluded at source, and small Quebec counts carry a randomized adjustment made at source. Shares divide by Statistics Canada’s count of live births for the year; the 2024 count is preliminary. Source: Statistics Canada, first names at birth (table 17-10-0147-01)
Not on the record in Puerto Rico, 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 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 Tadeo
Most people given the name Tadeo in the United States are children or teenagers today. The name belongs to this generation.
Estimated from US Social Security birth registrations and typical lifespans; a rough guide, not a rule.
The Tadeo deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Tadeo 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 Tadeo fits with your family’s names and surname.
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