Last name Гарау (Garau 
, Гарау 
) , in all the world, is a common cognomen. The surname Гарау is habitual in Italy, where it is quite a common surname, Spain, where it is quite a rare surname, and Argentina, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Italy, Spain, and France. Very seldom, Гарау is the forename as well as the last name.