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Last name Grav (Grave , Grav , Grāvis ) , around the globe, is quite a common cognomen. The surname Grav is characteristic of Portugal, where it is quite a common surname, Norway, where it is quite a rare surname, and Latvia. Not in comparison with a country's population, it is the most numerous in Germany, Brazil, and Portugal. Much less frequently, Grav is the forename as well as the last name.