Moon Knight, Marc Spector, Steven Grant, and Jake Lockley: four different aspects of the same man who was resurrected by Khonshu (the Egyptian Lunar-God of Vengeance and Justice) to serve as his "avatar." Those unjust mortals who prey upon the innocents traveling at night, with powers that come from the moon, beware the Vengeance of the Moon Knight!
After petering out in the 1990s, Moon Knight managed to make a comeback in the 2000s with an all new ongoing title... before petering out again with a poorly received follow-up by Brian Bendis. However, come the mid-2010's, writers like Warren Ellis and Jed Mackay managed to help redefine the character, with a renewed emphasis on his mental health and facing off against supernatural foes.