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Across the world, Doil (Doil , دويل ) is a rare predominantly male, but very infrequently feminine first name. The first name Doil is characteristic of South Korea, where it is a rare boy's name, the United States, where it is a very rare boy's name, and Brazil, where it is an extremely rare principally boy's, but very seldom girly name. More prevalently, Doil is the last name as well as the forename.
Doil is also a name for the fictitious and mythical characters: .