Last name Illu (Ilo 
, Illu 
) , throughout the world, is a common cognomen. The surname Illu is habitual in North Macedonia, where it is quite a common surname, Georgia, where it is quite a rare surname, and Nigeria. Not in comparison with a country's population, it is the most numerous in Nigeria, Philippines, and Indonesia. Likewise, Illu is the forename as well as the last name.