Surname Prasittidech (Prasittidech 
) , all around the world, is a very rare last name. The cognomen Prasittidech is characteristic of Thailand, where it is a very rare surname, and China, where it is an extremely rare surname. Very seldom, Prasittidech is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Prasittidech | Thailand, China |
ประสิทธิเดช, and ประสิทธิ์เดช