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