StarWars.com has revealed the Official Name for Episode VIII which is "The Last Jedi".
"We have the greatest fans in this or any other galaxy. In appreciation of the fans, we wanted them to be the first to know the title of the next chapter in the Skywalker saga: STAR WARS: THE LAST JEDI.
THE LAST JEDI is written and directed by Rian Johnson and produced by Kathleen Kennedy and Ram Bergman and executive produced by J.J. Abrams, Jason McGatlin, and Tom Karnowski. STAR WARS: THE LAST JEDI is scheduled for release December 15, 2017."