Surname Patchai (พัฒน์ชัย 
, Patchai 
, Пачай 
) , all around the world, is a rare last name. The last name Patchai is habitual in Malaysia, where it is a rare surname, South Africa, where it is a very rare surname, and Thailand. Not in comparison with a country's population, it is the most numerous in Malaysia, Russia, and South Africa. Also, Patchai is the forename as well as the last name.