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Surname Gro (Gro , Gróa , Гро ) , all over the world, is quite a rare last name. The family name Gro is characteristic of Germany, where it is quite a rare surname, Austria, where it is a rare surname, and Israel. Measured by absolute frequency, it is the most numerous in Germany, Mexico, and Algeria. Likewise, Gro is the forename as well as the last name.