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Family name Hertwig (Hertwig
) , in all the world, is quite a rare cognomen. The family name Hertwig is habitual in Germany, where it is quite a rare surname, Norway, where it is a rare surname, and France, where it is a very rare surname. Measured by absolute frequency, it is commonest in Germany, the United States, and France. Very seldom, Hertwig is the forename as well as the last name.