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Cognomen Khamraj (Khamraj ) , throughout the world, is a very rare last name. The last name Khamraj is habitual in Canada, where it is a very rare surname, Venezuela, where it is an extremely rare surname, and the United States. Measured by absolute frequency, it is the most numerous in the United States, India, and Canada. More prevalently, Khamraj is the forename as well as the last name.