Surname Buas (บัว 
, Buas 
) , throughout the world, is a rare last name. The cognomen Buas is habitual in Malaysia, where it is a rare surname, Brazil, and Philippines, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Brazil, Philippines, and Indonesia. More prevalently, Buas is the forename as well as the last name.