Last name พลอยสี (พลอยสี 
) , in the entire world, is a rare surname. The last name พลอยสี is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, พลอยสี is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| พลอยสี | Thailand |