Surname Ploychan (Ploychan 
) , in the world, is an extremely rare family name. Much more frequently, Ploychan is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Ploychan | Thailand |
Sirirat, Sukkong, Kanlaya, Tomgrajang, Suksabai, Svetavimala, Phosopha, and Thipmontian