All around the world, 克萊 (Clay , Klein , 克萊) is a common principally masculine, but scarcely female first name. The given name 克萊 is habitual in Saint Lucia, where it is quite a common boy's name, the United States, where it is quite a rare male name, and Luxembourg, where it is quite a rare unisex name. In absolute terms, this name is the most popular in the United States, the Democratic Republic of the Congo, and Indonesia. More prevalently, 克萊 is the last name as well as the forename.
克萊 is also a popular name for the fictitious and mythical characters: Clay Kaczmarek , the Assassin's Creed character, Assassin's Creed II; Odd Man , the fictional comic book hero created by Steve Ditko; Clay Morrow , the fictional character in the FX television series Sons of Anarchy; Clay Davis , the character from The Wire and Clay Jensen , the fictional character in the novel Thirteen Reasons Why and its television adaptation, 13 Reasons Why, and in many other works.