Cognomen ประเสริฐวัฒน์ (ประเสริฐวัฒน์ 
) , all around the world, is an extremely rare surname. The family name ประเสริฐวัฒน์ is habitual in South-eastern Asia, particularly Thailand, where it is a very rare surname. Likewise, ประเสริฐวัฒน์ is the forename as well as the last name.