Cognomen 牛山 (牛山 
) , globally, is a very rare last name. The cognomen 牛山 is characteristic of Eastern Asia, particularly China, where it is an extremely rare surname. More prevalently, 牛山 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 牛山 | China |
| 牛山純一 Japanese videographer (1930-1997), JP (b. 1930) |
|