The Jokers real name has been a topic of debate and mystery for a long time. While there have been several names used for the character in various adaptations, there is no official name for the Joker in the prime universe DC Comics. However, in the alternate universe series called Batman: Curse of the White Knight, the Jokers real name is revealed to be Jack Napier). This name was also used in Tim Burtons Batman film, where the Joker was portrayed by Jack Nicholson). Other names used for the Joker in different adaptations include Arthur Fleck in the 2019 movie Joker and Jeremiah Valeska in the TV series Gotham. It is worth noting that the creators of the Joker character have intentionally maintained the mystery surrounding his true origins, as they believe it enhances the characters intrigue and popularity. Therefore, it is unlikely that there will ever be a canonical origin or true real name given to the Joker.