Surname สายพงศ์ (Saitthapong 
, Saipong 
, Saiphong ) , in the world, is a rare cognomen. The surname สายพงศ์ is habitual in Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Much less frequently, สายพงศ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สายพงศ์, Saitthapong | Thailand |
| Saipong | Thailand, Philippines, United States |
| Saiphong | Thailand, United States |