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Surname Sinkevič (Синкевич , Sinkevič ) , in the world, is quite a common cognomen. The family name Sinkevič is habitual in Belarus, where it is quite a common surname, Lithuania, where it is quite a rare surname, and Russia. In absolute terms, it most frequently occurs in Belarus, Russia, and Kazakhstan. Much less frequently, Sinkevič is the forename as well as the last name.