Surname พญาชัย (พญาชัย 
) , in all the world, is a very rare last name. The family name พญาชัย is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, พญาชัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| พญาชัย | Thailand |