Last name เศรษฐิวงศ์ (เศรษฐิวงศ์ 
, Settiwong) , in all the world, is an extremely rare family name. The surname เศรษฐิวงศ์ is characteristic of South-eastern Asia, particularly Thailand, where it is an extremely rare surname. More prevalently, เศรษฐิวงศ์ is the forename as well as the last name.