Last name บ่วย (Buai 
, บ่วย) , in the entire world, is a rare family name. The family name บ่วย is characteristic of Malaysia, where it is a rare surname, Myanmar, where it is a very rare surname, and Nigeria, where it is an extremely rare surname. Not in comparison with a country's population, it most frequently occurs in Malaysia, Myanmar, and China. Likewise, บ่วย is the forename as well as the last name.