Last name מרנו (Marano 
, מרנו 
) , across the world, is a common cognomen. The surname מרנו is habitual in Italy, where it is quite a common surname, Argentina, where it is quite a rare surname, and Switzerland. In absolute terms, it is commonest in Italy, the United States, and Argentina. Much less frequently, מרנו is the forename as well as the last name.