Last name กูลพัฒนศักดิ์ (กูลพัฒนศักดิ์ 
) , in the world, is an extremely rare surname. The cognomen กูลพัฒนศักดิ์ is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname.
| VARIANT | COUNTRY |
|---|---|
| กูลพัฒนศักดิ์ | Thailand |