Tadashi
Meaning
loyal, upright, faithful
Popularity, 1890–2024
Shape drawn from US Social Security baby-name records. Tadashi has stayed rare in US records the whole time: no peak decade to name.
See popularity in Brazil
Popularity in Brazil
382 people · the #16,106 first name in Brazil · about 1 in 500,000 · median age 72
Among people named Tadashi living in Brazil at the 2022 census, more were born in the 1940s than in any other decade.
Source: IBGE, Censo Demográfico 2022
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.
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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