All around the world, レイ (Lei 
, Ray , Rey , and others...) is a widespread gender-neutral first name. The forename レイ is habitual in Mongolia, where it is a prevalent female name, Macao, where it is a common gender-neutral name, and Philippines (explore the name in all countries). In absolute terms, it is commonest in Philippines, the United States, and Mongolia. More prevalently, レイ is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Rey, Rhea, Ray, Rei, Rae, Raye, Lei, Lay, Ley | Myanmar, United States, Philippines, India, China |
| レイ | Japan |
| Rej | Indonesia, United States, Philippines, India, France |
| Wray | Mexico, Indonesia, United States, India, France |
| Waise | United Kingdom, Germany, United States, Malaysia, India |
King, Kingová, Koning, König, Laye, Lej, Lui, Léi, Lôi, Lûi, Lěi, Rachel, Raimond, Raimondo, Rais, Raymond, Re, Rea, Redmond, Rij, Roi, Ρέι, Кинг, Кёниг, Кінг, Лей, Лэй, Райманд, Раймон, Раймонд, Раймондо, Раймунд, Рамон, Редмонд, Рей, Реймонд, Рэй, Рэймонд, קינג, קניג, רחל, ריי, ריימונד, راي, رايموند, ري, ريمون, ريه, ری, كينغ,
レイ is also a prevalent name for the fictitious and mythical characters: Rei Ayanami , the fictional character in the media franchise Neon Genesis Evangelion; Rhea , the female Titan in Greek mythology, mother of Zeus and mother of Hera; Sailor Mars , the fictional character from Sailor Moon; Ray Palmer , the fictional character from the television series Arrow and Legends of Tomorrow, The Flash and Rey , the fictional character in Star Wars, Star Wars Episode VII: The Force Awakens, and in many other works.