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Family name Gueguen (Gueguen , Геган , Guéguen ) , in the entire world, is quite a common last name. The family name Gueguen is habitual in France, where it is quite a common surname, Singapore, where it is a rare surname, and Belarus. Measured by absolute frequency, the name is most common in France, Japan, and the United States. Much less frequently, Gueguen is the forename as well as the last name.