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Cognomen Ghailan (غيلان , Ghailan ) , in the world, is quite a common surname. The surname Ghailan is characteristic of Yemen, where it is quite a common surname, Morocco, where it is quite a rare surname, and Bahrain. In absolute terms, it is the most numerous in Yemen, Morocco, and Saudi Arabia. Also, Ghailan is the forename as well as the last name.