Family name พันชัย (Panchai 
, พันชัย , Phanchai ) , in all the world, is quite a rare last name. The surname พันชัย is habitual in South-eastern Asia, particularly Thailand, where it is quite a rare surname, Myanmar, where it is a rare surname, and Malaysia, where it is a very rare surname. In absolute terms, it is commonest in Thailand, Myanmar, and India. Also, พันชัย is the forename as well as the last name.