Worldwide, สายยุทธ์ (สายยุทธ์ 
) is a very rare epicene first name. The first name สายยุทธ์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare epicene name. Much less frequently, สายยุทธ์ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| สายยุทธ์ | Thailand |