Across the world, Луіс (Луіс 
) is a very rare largely boy's, but seldom feminine first name. The first name Луіс is characteristic of Eastern Europe, particularly Ukraine, where it is a very rare principally male, but scarcely girly name. Much less frequently, Луіс is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Луіс | Ukraine |
Chlodwig, Clodoveo, Clovis, Clóvis, Koldo, Lajos, Lewis, Lewys, Ljudevit, Lluis, Lluís, Loeiz, Loic, Loui, Louie, Louis, Love, Loïc, Loïck, Ludovic, Ludovico, Ludovicus, Ludvig, Ludvik, Ludwig, Ludwik, Luigi, Luis, Luiss, Luiz, Luã S, Luís, Miłość, Saint-Louis, Λουί, Λουδοβίκος, Λούης, Кловис, Лав, Лайош, Лов, Лове, Лоик, Лудвиг, Лудвик, Луи, Луиджи, Луис, Луис, Луи, Луиш,
Луіс is also a popular name for the fictitious and mythical characters: Louie , the The Simpsons character; Louis Tully , the fictional character from the Ghostbusters franchise; Louis Weasley , character in Harry Potter; Louis de Pointe du Lac , the fictional character created by Anne Rice, The Vampire Chronicles and Louis , the Jazz loving good Alligator from Disney's The Princess and the Frog, and in many other works.