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Cognomen Otts (Otts , Отц ) , around the world, is quite a rare last name. The cognomen Otts is characteristic of the United States, where it is a rare surname, Russia, and Chile, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in the United States, Russia, and China. Very seldom, Otts is the forename as well as the last name.