Surname 白菜 (白菜 
, Petsay 
) , across the world, is a very rare family name. The cognomen 白菜 is characteristic of Philippines, where it is a very rare surname, and China, where it is an extremely rare surname. Much more frequently, 白菜 is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| 白菜 | China |
| Petsay | Philippines |