Family name Thasy (Thasy 
) , all over the world, is a rare last name. The surname Thasy is habitual in Laos, where it is quite a rare surname, Mexico, where it is an extremely rare surname, and the United States. Not in comparison with a country's population, it is the most numerous in Laos, India, and Mexico. Likewise, Thasy is the forename as well as the last name.