Surname Boist (Boist 
, Boiste 
) , across the world, is a rare last name. The last name Boist is habitual in France, where it is a rare surname, Germany, where it is a very rare surname, and Canada. Not in comparison with a country's population, it most frequently occurs in France, Germany, and China. Very seldom, Boist is the forename as well as the last name.