Last name สายเพ็ชร (สายเพ็ชร 
, Saiphet 
) , worldwide, is a rare cognomen. The surname สายเพ็ชร is characteristic of Thailand, where it is quite a rare surname, and the United States, where it is an extremely rare surname. Likewise, สายเพ็ชร is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สายเพ็ชร | Thailand |
| Saiphet | United States, Thailand |