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.