Globally, エックス (X 
, Ex , エックス 
) is a common mostly boy's, but uncommonly girly first name. The first name エックス is characteristic of Taiwan, where it is quite a common predominantly boy's, but very infrequently girly name, Albania, where it is quite a rare male name, and United Arab Emirates, where it is quite a rare unisex name. Not in comparison with a country's population, this name is the most popular in Indonesia, Taiwan, and China. Also, エックス is the last name as well as the forename.
エックス is also a name for the fictitious and mythical characters: X , the fictional character from Battle for Dream Island, r/place; X Drake , the fictional character from One Piece; X , the fictional character in The X-Files; X , the comic book Character and Ex Nihilo (comics) , the comic Character.