Last name กรันชัย (กรันชัย 
) , throughout the world, is an extremely rare family name. The cognomen กรันชัย is habitual in South-eastern Asia, particularly Thailand, where it is an extremely rare surname. Also, กรันชัย is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| กรันชัย | Thailand |