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Cognomen Oaten (Oaten
) , around the globe, is a rare family name. The last name Oaten is habitual in Isle of Man, where it is quite a rare surname, Australia, where it is a rare surname, and the United Kingdom. Measured by absolute frequency, it is the most numerous in the United Kingdom, Australia, and the United States. Very seldom, Oaten is the forename as well as the last name.