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Family name Groch (Groch , Грох , Грош ) , all over the world, is quite a rare last name. The family name Groch is habitual in Eastern Europe, particularly Ukraine, where it is quite a rare surname, Slovakia, and Poland, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Ukraine, Poland, and the United States. Much less frequently, Groch is the forename as well as the last name.