Recently got myself hyped up for the X-Men Apocalypse movie by rereading The Rise of Apocalypse graphic novel. Also I've been reacquainting myself with titles from the Age of Apocalypse event that happened in 1995. That's when the X-titles were renamed for 4 months. Observe:

Uncanny X-Men = Astonishing X-Men
X-Men = Amazing X-Men
X-Force = Gambit & the X-Ternals
Generation X = Generation Next
X-Factor = Factor-X
Wolverine = Weapon X
Xcalibur = X-Calibre
Cable = X-Man