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All over the world, Glay (Glay , สีเทา ) is a rare largely masculine, but uncommonly female first name. The first name Glay is habitual in the Democratic Republic of the Congo, where it is a rare boy's name, Iraq, where it is a rare gender-neutral name, and Thailand, where it is a very rare epicene name. Measured by absolute frequency, it is the most numerous in the Democratic Republic of the Congo, Iraq, and Pakistan. Likewise, Glay is the last name as well as the forename.