Cognomen Keywan (Keywan 
) , in the world, is a very rare last name. The family name Keywan is habitual in Canada, where it is a very rare surname, Israel, and the United States, where it is an extremely rare surname. In absolute terms, it is the most numerous in the United States, Canada, and Germany. More prevalently, Keywan is the forename as well as the last name.
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