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Last name Chirai (Chirai , Ширай , Шираи ) , around the world, is quite a rare family name. The cognomen Chirai is habitual in Eastern Europe, particularly Ukraine, where it is quite a rare surname, Belarus, where it is a rare surname, and Russia. Measured by absolute frequency, it is the most numerous in Ukraine, Russia, and India. More prevalently, Chirai is the forename as well as the last name.