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Last name Poom (ภูมิ , Poom , Поом ) , throughout the world, is quite a rare cognomen. The last name Poom is habitual in Estonia, where it is quite a common surname, Hong Kong, where it is a rare surname, and Thailand. Measured by absolute frequency, it is commonest in Estonia, Thailand, and Egypt. More frequently, Poom is the forename as well as the last name.