Last name Krutin (Krutin 
, Крутинь 
, Крутин 
) , in the entire world, is a rare surname. The last name Krutin is characteristic of Russia, where it is a rare surname, Poland, and Kazakhstan. Not in comparison with a country's population, the name is most common in Russia, Poland, and Thailand. Much less frequently, Krutin is the forename as well as the last name.