Last name Ваи (Wahis 
, Ваи 
) , all around the world, is a rare family name. The family name Ваи is characteristic of Malaysia, where it is a rare surname, Belgium, and Kazakhstan, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Malaysia, Belgium, and France. Much less frequently, Ваи is the forename as well as the last name.