Last name Рагуса (Ragusa 
, Рагуса) , globally, is a common cognomen. The cognomen Рагуса is characteristic of Italy, where it is quite a common surname, Argentina, where it is quite a rare surname, and Switzerland. Not in comparison with a country's population, it most frequently occurs in Italy, the United States, and Argentina. Much less frequently, Рагуса is the forename as well as the last name.