Surname Ilu (Il 
, Ilu 
, Hilo ) , in all the world, is a common cognomen. The last name Ilu is characteristic of Morocco, where it is quite a common surname, Algeria, where it is quite a rare surname, and Mauritius. Measured by absolute frequency, it most frequently occurs in Morocco, Algeria, and Nigeria. Likewise, Ilu is the forename as well as the last name.