Last name ไชยอรุณ (Chaisarun 
, ไชยอรุณ , Chairaun ) , throughout the world, is a very rare cognomen. The family name ไชยอรุณ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Much less frequently, ไชยอรุณ is the forename as well as the last name.