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Across the world, Lex (Lex , 雷克斯 , Лекс ) is quite a common principally male, but very infrequently girly given name. The first name Lex is habitual in Suriname, where it is quite a common boy's name, Luxembourg, and Montenegro, where it is quite a rare feminine name. Measured by absolute frequency, it is commonest in the United States, Indonesia, and Philippines. Likewise, Lex is the last name as well as the forename.
Lex is also a prevalent name for the fictitious and mythical characters: Lex Luthor , the supervillain appearing in DC Comics publications and related media, Justice League; Lex Luthor , the fictional character from the television series Smallville; Lex Luthor , the fictional character from the television series Supergirl, The Flash; Lex Luthor, Jr. , character in Lois & Clark: The New Adventures of Superman and Lex Luthor , the villain in the film Superman (1978), and in many other works.