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Surname Inso (Inso , อินโส ) , in the world, is quite a common family name. The cognomen Inso is habitual in Philippines, where it is quite a rare surname, Qatar, where it is a rare surname, and United Arab Emirates. Measured by absolute frequency, it most frequently occurs in Philippines, Thailand, and Saudi Arabia. Very seldom, Inso is the forename as well as the last name.