All around the world, ルイ (Louis 
, Rui 
, Lui , and others...) is a widespread boy's given name. The first name ルイ is habitual in Portugal, where it is a widespread boy's name, France, where it is a common male name, and Luxembourg (explore the name in all countries). In absolute terms, it most frequently occurs in France, the United States, and Portugal. Much less frequently, ルイ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Lui, Louis | Portugal, China, Taiwan, United States, France |
| Rui, Louie, Ruy | Portugal, China, United States, France, Brazil |
| ルイ | Japan |
Chlodwig, Clodoveo, Clovis, Clóvis, Koldo, Lajos, Lewis, Lewys, Li, Ljudevit, Lluis, Lluís, Loeiz, Loic, Loui, Love, Loïc, Loïck, Ludovic, Ludovico, Ludovicus, Ludvig, Ludvik, Ludwig, Ludwik, Luigi, Luis, Luiz, Luj, Luã S, Luís, Miłość, Ri, Roderick, Roderigo, Roderik, Roderyk, Rodrigo, Roi, Ruderico, Ruì, Rúrik, Saint-Louis, Λουί, Λουδοβίκος, Λούης, Кловис, Лав, Лайош, Лов,
ルイ is also a prevalent name for the fictitious and mythical characters: Louie Duck , the fictional Disney character, Mickey's Once Upon a Christmas; Ruy Pérez de Viedma , character in Don Quixote; Louie , the The Simpsons character; Louis Tully , the fictional character from the Ghostbusters franchise and Louis de Pointe du Lac , the fictional character created by Anne Rice, The Vampire Chronicles, and in many other works.
| 小檜山ルイ Japanese historian, JP (b. 1957) |
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| 海月ルイ Japanese novelist, JP (b. 1958) |
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