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In the world, Sereja (Сережа , Серёжа , Sereja ) is quite a rare boy's first name. The first name Sereja is characteristic of Eastern Europe, particularly Moldova, where it is quite a common male name, Russia, where it is quite a rare male name, and Belarus, where it is a rare boy's name. Measured by absolute frequency, it is commonest in Russia, Moldova, and Kazakhstan. Much less frequently, Sereja is the last name as well as the forename.