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Family name Coup (Kup , Coup , Kupp ) , around the world, is quite a rare cognomen. The family name Coup is characteristic of Estonia, where it is quite a rare surname, Papua New Guinea, and New Zealand, where it is a rare surname. Measured by absolute frequency, the name is most common in the United States, Germany, and Papua New Guinea. Also, Coup is the forename as well as the last name.