Around the world, 哀 (Ai 
, Oi , 哀 ) is a common epicene first name. The first name 哀 is characteristic of Macao, where it is quite a common largely female, but seldom male name, Albania, where it is quite a common primarily boy's, but very seldom feminine name, and Indonesia, where it is quite a common mostly female, but infrequently masculine name (explore the name in all countries). In absolute terms, this name is the most popular in Indonesia, India, and Algeria. Also, 哀 is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Oi, Ai | Japan, China, Indonesia, Malaysia, Myanmar |
| 哀 | China |
| Āi | China, Myanmar |
哀 is also a popular name for the fictitious and mythical characters: Ai Haibara , the fictional character from Detective Conan; Ai Mizuno , the fictional character from Zombie Land Saga; Ai Miyashita , the fictional character from Love Live! Nijigasaki High School Idol Club; Ai Hinatsuru , the fictional character from Ryūō no Oshigoto! and Ai Hayasaka , the fictional character from Kaguya-sama: Love is War, and in many other works.