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Cognomen Ganto (Gant , Ganto , Wantus ) , throughout the world, is a common surname. The cognomen Ganto is habitual in Israel, where it is quite a rare surname, the United States, and Mongolia. Measured by absolute frequency, the name is most common in the United States, the United Kingdom, and Indonesia. Much less frequently, Ganto is the forename as well as the last name.