Family name Ilaj (Ilaj 
, Илай 
) , in all the world, is a rare cognomen. The surname Ilaj is characteristic of Kuwait, where it is a rare surname, Morocco, and Kyrgyzstan, where it is a very rare surname. Measured by absolute frequency, this name is the most popular in Pakistan, Morocco, and India. Also, Ilaj is the forename as well as the last name.