Surname Kunsak (กุลศักดิ์ 
, Kunsak 
) , in the entire world, is a rare family name. The surname Kunsak is characteristic of Thailand, where it is a rare surname, and the United States, where it is an extremely rare surname. Likewise, Kunsak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| กุลศักดิ์ | Thailand |
| Kunsak | India, Thailand, United States |