Last name Cisu (Cisu 
) , in all the world, is a rare cognomen. The last name Cisu is characteristic of Romania, where it is a rare surname, Italy, where it is an extremely rare surname, and the United States. Not in comparison with a country's population, this name is the most popular in Romania, India, and the United States. Very seldom, Cisu is the forename as well as the last name.