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Family name Khalilou (Khalilou , خليلو , Калилу) , worldwide, is quite a rare last name. The cognomen Khalilou is characteristic of Syria, where it is quite a rare surname, Algeria, and Tunisia, where it is a rare surname. Measured by absolute frequency, this name is the most popular in Algeria, Syria, and Iran. Likewise, Khalilou is the forename as well as the last name.