Family name ธาดาวัฒน์ (Thadawat 
, ธาดาวัฒน์ ) , globally, is an extremely rare last name. The last name ธาดาวัฒน์ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More frequently, ธาดาวัฒน์ is the forename as well as the last name.