Jason Voorhees is an Evil Dead-ite?
....so says 1993's Jason Goes To Hell Director, Adam Marcus! He even included a copy of the seminal Necronomicon-Ex Mortis in the Voorhees basement scene. Adam explains that he couldn't tell New Line Cinemas his grand design to "officially" include the Raimi franchise, as they didn't own the rights-but this whole time he was hoping fans would figure it out.
The backstory of the Jason character had always bothered him, in regards to him turning into this paranormal-killing machine seemingly overnight. Adam goes on to explain the involvement of Pamela Voorhees and the book of the dead. "She makes a deal with the devil by reading from the Necronomicon to bring back her son. This is why Jason isn't Jason. He's Jason plus The Evil Dead"