Last name Булс (Bouls 
, Buls 
, Булс 
) , throughout the world, is quite a rare family name. The surname Булс is habitual in Latvia, where it is quite a common surname, Belgium, where it is a rare surname, and Netherlands. In absolute terms, it is the most numerous in Latvia, Egypt, and the United States. Very seldom, Булс is the forename as well as the last name.