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Last name Poncelet (Poncelet ) , all over the world, is quite a common family name. The surname Poncelet is habitual in Western Europe, particularly Belgium, where it is quite a common surname, Luxembourg, and France, where it is quite a rare surname. In absolute terms, it most frequently occurs in Belgium, France, and the Democratic Republic of the Congo. Much less frequently, Poncelet is the forename as well as the last name.