Cognomen Niwayama (庭山 
, Niwayama 
) , all over the world, is a very rare family name. The surname Niwayama is habitual in China, where it is an extremely rare surname, and the United States. More prevalently, Niwayama is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 庭山 | China |
| Niwayama | China, United States |
| gen niwayama (b. 1929) |
|
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| satomi niwayama researcher |
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