Last name 月原 (月原 
, Tsukihara 
) , in the entire world, is a very rare family name. The surname 月原 is habitual in China, where it is an extremely rare surname, and the United States. More prevalently, 月原 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 月原 | China |
| Tsukihara | United States, China |
| 月原渉 Japanese novelist, JP (b. 1978) |
|