Surname Mustaj (Mustaj 
) , all around the world, is a rare family name. The last name Mustaj is characteristic of Southern Europe, particularly Albania, where it is quite a rare surname, Greece, where it is a rare surname, and Italy, where it is a very rare surname. In absolute terms, it most frequently occurs in Albania, India, and Greece. Likewise, Mustaj is the forename as well as the last name.