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Last name Decuypere (Decuypere ) , worldwide, is quite a rare cognomen. The family name Decuypere is habitual in Belgium, where it is quite a rare surname, France, where it is a rare surname, and Lithuania. Measured by absolute frequency, it is commonest in Belgium, France, and the Democratic Republic of the Congo. Very seldom, Decuypere is the forename as well as the last name.