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Family name Grube (Gruba , Grube , Gruva ) , in all the world, is a common surname. The family name Grube is characteristic of Latvia, where it is quite a common surname, Germany, and Poland, where it is quite a rare surname. Measured by absolute frequency, it is commonest in Germany, the United States, and Poland. Much less frequently, Grube is the forename as well as the last name.