Family name Buai (Buai 
, บ่วย, บ้วย) , around the world, is a rare cognomen. The surname Buai 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. In absolute terms, the name is most common in Malaysia, Myanmar, and China. Likewise, Buai is the forename as well as the last name.