Surname Thongsavang (Thongsavang 
) , all around the world, is a rare family name. The last name Thongsavang is habitual in Laos, where it is quite a rare surname, Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Much less frequently, Thongsavang is the forename as well as the last name.