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Cognomen Graba (Graba , Grava ) , in all the world, is quite a common last name. The family name Graba is habitual in Latvia, where it is quite a common surname, Tunisia, where it is quite a rare surname, and Switzerland. Not in comparison with a country's population, the name is most common in Nigeria, Italy, and Brazil. Likewise, Graba is the forename as well as the last name.