Surname ขวัญสมบูรณ์ (ขวัญสมบูรณ์ 
, Khwansomboon ) , in all the world, is a very rare family name. The last name ขวัญสมบูรณ์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, ขวัญสมบูรณ์ is the forename as well as the last name.