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Family name Hertzen (Hertzen
) , all around the world, is a rare cognomen. The cognomen Hertzen is habitual in Finland, where it is quite a rare surname, Sweden, where it is a rare surname, and Venezuela, where it is a very rare surname. Measured by absolute frequency, it is commonest in Finland, Sweden, and the United States. Much less frequently, Hertzen is the forename as well as the last name.