Cognomen Iamai (Iamai 
) , in the entire world, is an extremely rare last name. The surname Iamai is characteristic of Thailand, where it is an extremely rare surname, Brazil, and the United States. Not in comparison with a country's population, it most frequently occurs in India, Thailand, and Brazil. Likewise, Iamai is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Iamai | Brazil, Spain, Thailand, India, United States |