Surname 相生 (相生 
) , in all the world, is a rare last name. The cognomen 相生 is habitual in Eastern Asia, particularly China, where it is a very rare surname. More prevalently, 相生 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 相生 | China |
| 相生千恵子 Japanese actress and voice actress, JP (b. 1934) |
|