Surname Nichai (นิชัย 
, Nichai 
, Ничай 
) , in the entire world, is a rare cognomen. The surname Nichai is habitual in Ukraine, where it is quite a rare surname, Belarus, where it is a rare surname, and Kazakhstan. Measured by absolute frequency, it is commonest in Ukraine, Russia, and Thailand. Very seldom, Nichai is the forename as well as the last name.