Surname 希希 (希希 
, Xixi 
, Chihi 
) , across the world, is quite a common family name. The cognomen 希希 is characteristic of Tunisia, where it is quite a common surname, Albania, where it is quite a rare surname, and Morocco. In absolute terms, it most frequently occurs in Tunisia, China, and Morocco. Likewise, 希希 is the forename as well as the last name.