Cognomen Piliet (Bille 
, Piliet) , throughout the world, is a common surname. The surname Piliet is habitual in Denmark, where it is quite a common surname, Cameroon, and Belgium, where it is quite a rare surname. Not in comparison with a country's population, it most frequently occurs in Cameroon, India, and France. Much less frequently, Piliet is the forename as well as the last name.