Cognomen สายศิริ (Saisiri 
, สายศิริ , Saithsiri ) , worldwide, is a rare family name. The surname สายศิริ is characteristic of Thailand, where it is a rare surname, the United States, where it is an extremely rare surname, and India. Also, สายศิริ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Saisiri | India, Thailand, United States |
| สายศิริ, Saithsiri | Thailand |