Surname Mutii (Mutii 
) , in all the world, is a rare family name. The surname Mutii is habitual in Romania, where it is a rare surname, New Zealand, where it is a very rare surname, and Spain, where it is an extremely rare surname. In absolute terms, it most frequently occurs in Romania, the United States, and Spain. Very seldom, Mutii is the forename as well as the last name.