Surname สายวงศ์คำ (สายวงศ์คำ, Saivongkham 
, Saiwongkum 
) , all over the world, is a very rare cognomen. The surname สายวงศ์คำ is characteristic of Norway, where it is a very rare surname, and Thailand.
| VARIANT | COUNTRY |
|---|---|
| Saivongkham | Norway |
| Saiwongkum, Saiwongkhum | Thailand |