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In the entire world, Merson (Merson , 默森 , Мерсон ) is quite a rare male first name. The first name Merson is characteristic of Philippines, where it is a rare male name, the Democratic Republic of the Congo, and Peru, where it is a very rare masculine name. Measured by absolute frequency, it is commonest in Philippines, the Democratic Republic of the Congo, and Brazil. Likewise, Merson is the last name as well as the forename.