Cognomen พุทธาชัย (พุทธาชัย 
, Putthachai , Pootachai ) , throughout the world, is a very rare last name. The last name พุทธาชัย is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, พุทธาชัย is the forename as well as the last name.