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Throughout the world, Jóan (約翰 , Йохан , Jóan ) is a rare boy's forename. The given name Jóan is characteristic of Estonia, where it is a rare male name, Bulgaria, and China, where it is a very rare boy's name. Very seldom, Jóan is the last name as well as the forename.
Jóan is also a prevalent name for the fictitious and mythical characters: Tarzan , the fictional character from Edgar Rice Burroughs's Tarzan of the Apes, Tarzan and the Lion Man; Dr. John Watson , the fictional character of Sherlock Holmes; Dick Grayson , the one of several fictional characters using the identity Robin, Batman & Robin; Martian Manhunter , the fictional superhero that appears in DC Comics' publications, Smallville and Falstaff , the Shakespeare character, Chimes at Midnight, and in many other works.