Surname ท่วย (Thuai 
, ท่วย) , all over the world, is a rare family name. The cognomen ท่วย is characteristic of Myanmar, where it is a rare surname, Malaysia, where it is a very rare surname, and the United States, where it is an extremely rare surname. In absolute terms, the name is most common in Myanmar, Malaysia, and India. Much less frequently, ท่วย is the forename as well as the last name.