Surname Маруи (丸 
, Marui 
, Маруи) , all around the world, is a common cognomen. The surname Маруи is habitual in China, where it is a rare surname, Malaysia, and Brazil, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in China, Brazil, and Indonesia. Very seldom, Маруи is the forename as well as the last name.