This game has been remade a few times. Is there any spot in these games, which are basically dungeon crawls, where Dracula's name is revealed? I remember a Saturday morning cartoon and I remember him calling himself something like Frank [ved] Einengul. It may also be a reference to Blue Thunder.
According to Castlevania III the Curse of Dracula, and the animated Castlevania Alucard is the son of Dracula.
I may have missed it, but I think the Saturday morning cartoon was called "Ed Einengul's Twilight 3000". or maybe "Fright Night."