Last name พิทยชัย (พิทยชัย 
) , all over the world, is a very rare surname. The family name พิทยชัย is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More prevalently, พิทยชัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| พิทยชัย | Thailand |