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Surname גרונאו (Gronau
, גרונאו
) , around the globe, is quite a common last name. The family name גרונאו is characteristic of Germany, where it is quite a rare surname, Puerto Rico, and Austria. Measured by absolute frequency, it is the most numerous in Germany, the United States, and Austria. Very seldom, גרונאו is the forename as well as the last name.