Family name Jiyasak (Jiyasak 
) , in the entire world, is an extremely rare cognomen. The cognomen Jiyasak is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More frequently, Jiyasak is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Jiyasak | India, Thailand |