Family name ธีรชัยไพศาล (ธีรชัยไพศาล 
, Thirachaipaisan, Thirachaiyapaisan ) , across the world, is a very rare surname. The family name ธีรชัยไพศาล is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, ธีรชัยไพศาล is the forename as well as the last name.