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Across the world, Duyn (דין , Duyn , 杜因) is a very rare epicene first name. The first name Duyn is characteristic of Israel, where it is a rare mostly boy's, but uncommonly feminine name, and the United States, where it is an extremely rare gender-neutral name. More prevalently, Duyn is the last name as well as the forename.
Duyn is also a popular name for the fictitious and mythical characters: Dean Winchester , the fictional character in the TV series Supernatural; Dean Thomas , the wizard in the Harry Potter universe; Dean McCoppin , the fictional human from The Iron Giant; Dean Forester , the fictional character from the television series Gilmore Girls and Dean Learner , the fictional character, and in many other works.