Cognomen กมลวัฒน์ (กมลวัฒน์ 
, Kamonwat 
, Kamonvat ) , across the world, is a rare family name. The last name กมลวัฒน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname, and Malaysia, where it is an extremely rare surname. More prevalently, กมลวัฒน์ is the forename as well as the last name.