Surname Китсу (Kitsu 
, Китсу 
) , in all the world, is a rare cognomen. The family name Китсу is habitual in Bulgaria, where it is a rare surname, the United States, where it is a very rare surname, and Mexico, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in the United States, Brazil, and Bulgaria. Much more frequently, Китсу is the forename as well as the last name.