Family name ดรุณวัฒน์ (ดรุณวัฒน์ 
, Dornlunwat ) , across the world, is an extremely rare cognomen. The cognomen ดรุณวัฒน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. Also, ดรุณวัฒน์ is the forename as well as the last name.