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In all the world, Kiaj (Gas , Castel , Kiaj ) is quite a common predominantly masculine, but very seldom female forename. The given name Kiaj is habitual in Mauritius, where it is quite a rare gender-neutral name, the Democratic Republic of the Congo, where it is quite a rare masculine name, and Tunisia. Not in comparison with a country's population, this name is the most popular in the Democratic Republic of the Congo, Indonesia, and Nigeria. More frequently, Kiaj is the last name as well as the forename.
Kiaj is also a name for the fictitious and mythical characters: gas attendant , the fictional character from The Gnome-Mobile.