Cognomen เอื้ออรุณ (Uarun 
, เอื้ออรุณ, Auarun ) , throughout the world, is a very rare surname. The surname เอื้ออรุณ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Likewise, เอื้ออรุณ is the forename as well as the last name.