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Family name Wren (レン , Wren , رن ) , globally, is a common surname. The cognomen Wren is habitual in Reunion, where it is quite a common surname, Japan, and the United Kingdom, where it is quite a rare surname. Not in comparison with a country's population, this name is the most popular in Japan, the United States, and the United Kingdom. Very seldom, Wren is the forename as well as the last name.