Cognomen Орсо (Orso 
, Орсо 
) , throughout the world, is quite a common family name. The last name Орсо is habitual in Italy, where it is quite a rare surname, Hungary, and Argentina. Not in comparison with a country's population, it most frequently occurs in Brazil, Italy, and the United States. Very seldom, Орсо is the forename as well as the last name.