Cognomen สายวิไล (Saiwilai 
, สายวิไล , Saiwilay ) , around the globe, is a rare surname. The cognomen สายวิไล is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Much less frequently, สายวิไล is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Saiwilay, สายวิไล, Saiwilai | Thailand |