Family name Sayumi (Sayumi 
) , in all the world, is a rare cognomen. The surname Sayumi is habitual in Indonesia, where it is a very rare surname, Peru, and Malaysia. Not in comparison with a country's population, this name is the most popular in Indonesia, China, and Peru. More frequently, Sayumi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Sayumi | Indonesia, United States, Japan, Sri Lanka, China |