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Last name Grubyy (Грубый , Grubyy , Грубии ) , in the entire world, is a rare cognomen. The cognomen Grubyy is characteristic of Russia, where it is a rare surname, Kazakhstan, and Kyrgyzstan, where it is a very rare surname. In absolute terms, it most frequently occurs in Russia, Kazakhstan, and Ukraine. Very seldom, Grubyy is the forename as well as the last name.