Masao
Meaning
a right and proper man, or hero, depending on the kanji
Popularity, 1890–2024
Shape drawn from US Social Security baby-name records. Masao has stayed rare in US records the whole time: no peak decade to name.
See popularity in Brazil
Popularity in Brazil
189 people · the #26,468 first name in Brazil · about 1 in 1,000,000 · median age 72
Among people named Masao 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 Masao
People given the name Masao in the United States span the generations: the middle half were born anywhere from 1930 to 2019. Age is the one thing the name won't tell you.
Estimated from US Social Security birth registrations and typical lifespans; a rough guide, not a rule.
The Masao deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Masao 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 Masao fits with your family’s names and surname.
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