Surname สินธุวัฒน์ (สินธุวัฒน์ 
, Sinthuwat , Sindhuwat ) , in the world, is a rare last name. The last name สินธุวัฒน์ is characteristic of South-eastern Asia, particularly Thailand, where it is a rare surname. Very seldom, สินธุวัฒน์ is the forename as well as the last name.