Family name สายพัฒน์ (Saipat 
, สายพัฒน์ ) , in the world, is a rare cognomen. The surname สายพัฒน์ is habitual in Thailand, where it is a rare surname, Malaysia, where it is a very rare surname, and India, where it is an extremely rare surname. Much less frequently, สายพัฒน์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Saipat | Thailand, India, Malaysia |
| สายพัฒน์ | Thailand |