The following contains spoilers for Flashpoint Beyond #5, on sale now from DC Comics.

The Joker is a mystery. Even when he was given a defining origin story in Alan Moore and Brian Bolland's Batman: The Killing Joke, that story ended with the Joker himself admitting it could have been another lie. A few names have floated around for the character over the years, and his definitive origin has almost been uncovered, but who he really is has remained a total uncertainty - until now.

There were a plethora of revelations in Flashpoint Beyond #5 (by Geoff Johns, Tim Sheridan, Jeremy Adams, Xermánico, Mikel Janín, Romulo Fajardo Jr., Jordie Bellaire and Rob Leigh). However, none were quite as shocking as one thing that Flashpoint Joker revealed to Thomas Wayne. The Flashpoint Batman was in a race against time to stop his wife, who had been learning all about time travel since narrowly avoiding death the last time she was seen. Sher had also been tracking down every potential time traveler in this twisted timeline and knew the identities of people from the old one. One of those people was the Joker.

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Flashpoint Beyond 5 Joker's name Jack Oswald White

Martha had interrogated Psycho-Pirate about the differences between the two timelines. From him, she learned the Joker's real name is Jack Oswald White. In this altered timeline, he lived happily with his wife and child and even worked in Wayne Casino. Although she killed everyone else related to the true DC timeline, Flashpoint Joker decided to keep the other Joker alive. Mainly because she saw that his family was happier than hers ever was.

This is a shocking development, due to how closely guarded the name of the Joker has been. No one has ever dared give the character a definitive name before, as it's widely perceived to be something that would ruin the mystery of the character. However, this revelation ties into another recent story that sought to give a more definitive origin to the Joker.

Batman: Three Jokers which was also written by Geoff Johns, with art by Jason Fabok, may have explained the shocking New 52 Justice League revelation that there were actually three Jokers in the DC Universe, but it was far more definitive in its ending than its title suggested. After Jason Todd had killed one of them, the other was killed by the remaining Joker, leaving that one, essentially, the definitive Joker. The ending of Three Jokers treated him as the true version of the character. His origin not only lined up directly with the one seen in The Killing Joke, but it also added a twist that gave him more legitimacy.

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Batman Joker Name

In the final pages of Batman: Three Jokers, the Dark Knight revealed to Alfred that he had known the Joker's name a week after they had first met. This line revealed two things. The first is that within a week of encountering the Joker, Batman discounted the other two as being fakes. The second is that the Joker's origin in The Killing Joke really was true, but with one difference unknown to Joker himself. His wife and child didn't die - they left. The family that Flashpoint Joker talks about in this issue is that same family but, as with most things in this timeline, things went very differently, and they lived happily ever after.

At the end of Three Jokers, Batman claimed that the Joker's name could never ever be known, otherwise, the press would learn that his family is actually in hiding. Once the Joker found that out, he would return and kill them. The fact that Martha revealed it here, where there is no threat from people knowing the Joker's name, suggests that this is the Joker's real name. Now, not only have his true origins been confirmed but his name along with it. The mystery surrounding Joker is gone; or is it? There have been a few names for the Joker thrown around over the years.

Jack Napier is the most popular and most well-known. The name Jack White that is used here was originally used in the video game Batman: Arkham Asylum. The fact it's been used as an alias before, and therefore still could be, is just one of the problems with this new information. Another is how Psycho-Pirate knew the Joker's name. Despite his unique circumstances, he shouldn't have that knowledge. Then there's the fact that Three Jokers hasn't actually been confirmed as canon yet, which would remove most of this revelation's credibility. All in all, there's enough uncertainty here to satisfy fans who think Joker's origins should remain a mystery and those who want a definitive answer.