Family name สายสุดใจ (สายสุดใจ 
, Saisudchai 
) , all over the world, is a rare surname. The last name สายสุดใจ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, สายสุดใจ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สายสุดใจ | Thailand |
| Saisudchai | Thailand, United States |