Cognomen โรจน์ศิริพรชัย (โรจน์ศิริพรชัย 
, Rojnsiripornchai, Rojsiripornchai ) , in all the world, is a very rare family name. The family name โรจน์ศิริพรชัย is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname.