Lets compose Incusion Criteria   Ok we leave it too long I propose following criteria to incuding entries on this list  The element must has signification impact in the work Simply having word Cthulhu as grafiti in one comic panel doesnt noaable enough Nor does having Deep One as one of minor enemies in games A Necronomicon can be spot on main characters bookshelf doesnt count either As enemy in games the thing must be at least a major boss The necronomicon must has vital role and it must be Lovecraft necronomicon secondhand derived from Evil Dead doesnt count  If the names are different from mythos citation need Nope similar name isnt enough You may think its obvious but there is chance that the name actually derived from something else or the author simply want weird name In fact many of deities in Aztec mythology has name as weird as Cthulhu How about that