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Surname Ēn (Ian , 恩 , Iaan ) , globally, is a common last name. The family name Ēn is habitual in Macao, where it is a common surname, Lebanon, where it is quite a common surname, and Malaysia, where it is quite a rare surname. In absolute terms, it is commonest in China, Indonesia, and Kenya. More prevalently, Ēn is the forename as well as the last name.