It should be noted that numerous demons and supernatural beings have laid claim to the title of "Satan" throughout Marvel's publication history. To date, no one being has been confirmed as being the one true "Satan" of the Marvel Universe; the demon Marduk Kurios has himself expressed doubt that a true "Satan" even exists. A fallen angel, whose existence and status remains speculative, was known as Shaitan and Satan. While most appearances of a "Satan" character have been attributed to either Marduk Kurios, Mephisto or Satannish, many more ambiguous depictions of "Satan" have still not been attributed to any one of the known Hell-Lords, may even be appearances of a completely separate entity all together, and will consequently be listed on a distinct page. The Marvel Database Project has made every attempt to distinguish between the various beings that have claimed to be "Satan", but does stress that it may never be truly possible to completely and accurately map the appearances and histories of all characters with claims to the title of Satan.