Surname Kailou (Kailou 
) , in the world, is a rare cognomen. The surname Kailou is characteristic of Papua New Guinea, where it is quite a rare surname, Niger, where it is a rare surname, and Greece, where it is a very rare surname. Measured by absolute frequency, the name is most common in Niger, Papua New Guinea, and the United Kingdom. Likewise, Kailou is the forename as well as the last name.