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Last name Saiko (Saiko , Сайко , Саико ) , throughout the world, is a common cognomen. The last name Saiko is characteristic of Belarus, where it is quite a common surname, Ukraine, where it is quite a rare surname, and Egypt. Not in comparison with a country's population, it most frequently occurs in Ukraine, Russia, and Egypt. Very seldom, Saiko is the forename as well as the last name.