All over the world, ประถมชัย (ประถมชัย 
) is a very rare gender-neutral first name. The first name ประถมชัย is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare unisex name. Likewise, ประถมชัย is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| ประถมชัย | Thailand |