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Family name Sittisak (สิทธิศักดิ์ , Sittisak
) , in the entire world, is quite a common cognomen. The last name Sittisak is habitual in South-eastern Asia, particularly Thailand, where it is quite a rare surname. More prevalently, Sittisak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| สิทธิศักดิ์ | Thailand |
| Sittisak | United Kingdom, United States, Rwanda, Thailand |
Ситтисак, สิทธิศัก, สิทธิศัก์, and สิทธิ์ศักดิ์