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Cognomen Koyumi (Koyumi
, 小弓
) , in the world, is a rare surname. The last name Koyumi is habitual in Malaysia, where it is a rare surname, Japan, where it is a very rare surname, and Indonesia. More prevalently, Koyumi is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Koyumi | Brazil, Malaysia, Japan, Indonesia, United States |
| 小弓 | China |