Tadashi
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Meaning
loyal, upright, faithful
How popular is Tadashi around the world?
In the United States, 70 babies were named Tadashi between 2020 and 2025.
Tadashi is on the official records of the United States and Brazil.
United States
1 in 310,000
In the United States, 70 babies were named Tadashi between 2020 and 2025.
Shape drawn from US Social Security baby-name records. Tadashi 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 500,000
At the 2022 census, 382 people in Brazil were named Tadashi, ranked 16,106th, with a median age of 72.
Among people named Tadashi 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 2020
Tadashi is not on the 2024 record for Argentina, where small counts are withheld at source.
The count never rose above 4 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
Tadashi is not on the 2022 record for Mexico City, where small counts are withheld at source.
The count never rose above 7 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
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 Montevideo record for 1940 to 2011: that registry withholds nothing, so this spelling was not given there in those years. 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 Tadashi
Most people given the name Tadashi 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.
Keep exploring
The Tadashi deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Tadashi 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 Tadashi fits with your family’s names and surname.
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