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Cognomen Jarosława (Ярослава , Jarosława , ירוסלבה ) , around the world, is a rare last name. The cognomen Jarosława is habitual in Kyrgyzstan, where it is a rare surname, Belarus, and Russia. Not in comparison with a country's population, it is the most numerous in Russia, Kyrgyzstan, and Ukraine. Much more prevalently, Jarosława is the forename as well as the last name.