Family name กุลวิวัฒน์ (กุลวิวัฒน์ 
, Kulwiwat , Kunwiwat ) , all over the world, is a rare surname. The family name กุลวิวัฒน์ is habitual in South-eastern Asia, particularly Thailand, where it is a rare surname. Also, กุลวิวัฒน์ is the forename as well as the last name.