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Cognomen Cahan (جهان , Cahan , 卡恩 ) , in the entire world, is a common family name. The last name Cahan is habitual in Israel, where it is a widespread surname, Iran, where it is quite a rare surname, and Libya. Not in comparison with a country's population, this name is the most popular in Israel, India, and Iran. Very seldom, Cahan is the forename as well as the last name.