Family name สายพลอย (สายพลอย 
) , throughout the world, is a very rare last name. The cognomen สายพลอย is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, สายพลอย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สายพลอย | Thailand |