Last name Грун (Groen 
, Grun , Грун 
) , in the world, is a common family name. The cognomen Грун is characteristic of Netherlands, where it is quite a common surname, Luxembourg, and Denmark, where it is quite a rare surname. In absolute terms, it most frequently occurs in Netherlands, Germany, and the United States. Much less frequently, Грун is the forename as well as the last name.