Last name กาญจนาไพโรจน์ (กาญจนาไพโรจน์ 
, Karnchanaphairot , Kanjanapairoh) , in all the world, is an extremely rare cognomen. The family name กาญจนาไพโรจน์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname.