Around the globe, Louÿs (לואי 
, ルイス 
, Луи 
) is a rare predominantly boy's, but scarcely feminine first name. The forename Louÿs is habitual in Bulgaria, where it is a rare boy's name, Israel, where it is a rare primarily male, but scarcely feminine name, and Japan, where it is a rare male name. Not in comparison with a country's population, it most frequently occurs in Japan, Russia, and Bulgaria. Much less frequently, Louÿs is the last name as well as the forename.
Louÿs is also a prevalent name for the fictitious and mythical characters: Louie Duck , the fictional Disney character, Mickey's Once Upon a Christmas; Colonel Luis Tamayo , the character in « Money Heist », a member of the Spanish Intelligence that oversees Alicia's work in the case; Louie , the The Simpsons character; King Louie , the fictional character in The Jungle Book films and Louis Tully , the fictional character from the Ghostbusters franchise, and in many other works.