Koji
Meaning
meaning depends on the kanji chosen, often with ko meaning prosperous or happiness
Popularity, 1890–2024
Shape drawn from US Social Security baby-name records. Koji has stayed rare in US records the whole time: no peak decade to name.
See popularity in Brazil
Popularity in Brazil
245 people · the #21,979 first name in Brazil · about 1 in 1,000,000 · median age 68
Among people named Koji living in Brazil at the 2022 census, more were born in the 1950s than in any other decade.
Source: IBGE, Censo Demográfico 2022
When you meet Koji
Most people given the name Koji 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 Koji deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Koji 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 Koji fits with your family’s names and surname.
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