Preface
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, and may even be appearances of a completely separate entity all together.
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.