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Cognomen Raska (Raska , Раска , Raška ) , all around the world, is quite a rare family name. The family name Raska is characteristic of Czechia, where it is quite a common surname, Slovakia, where it is quite a rare surname, and Estonia. Measured by absolute frequency, it is commonest in Czechia, the United States, and Indonesia. Very seldom, Raska is the forename as well as the last name.