Surname มูลวัฒน์ (Munwat 
, มูลวัฒน์ , Moonwat ) , all over the world, is a very rare last name. The surname มูลวัฒน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a very rare surname. More frequently, มูลวัฒน์ is the forename as well as the last name.