Last name B-T (B-T 
) , globally, is a rare surname. The surname B-T is habitual in Algeria, where it is a rare surname, Morocco, and New Zealand, where it is a very rare surname. In absolute terms, it most frequently occurs in Algeria, Morocco, and France. Very seldom, B-T is the forename as well as the last name. Parts of the name also exists independently as a last name B, and a first name T.