Surname กาญจนศักดิ์ (กาญจนศักดิ์ 
, Kanjanasak , Kanchanasak 
) , in the world, is a very rare cognomen. The cognomen กาญจนศักดิ์ is characteristic of Thailand, where it is a very rare surname, Malaysia, and the United States, where it is an extremely rare surname. Likewise, กาญจนศักดิ์ is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Kanjanasak, กาญจนศักดิ์ | Thailand |
| Kanchanasak | United States, Thailand |
| Janasak | Malaysia, Canada, United States, Thailand |