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Cognomen Grunt (Grunt , Grund , Grunti ) , around the globe, is a common family name. The surname Grunt is habitual in Czechia, where it is quite a common surname, Germany, and Luxembourg, where it is quite a rare surname. Not in comparison with a country's population, this name is the most popular in Germany, the United States, and Czechia. Very seldom, Grunt is the forename as well as the last name.