Demon Vampires were the very first Vampires in existence beside the Original Vampires, only one being has been known to be a Demon Vampire which is both a Original Vampire and a Demon with that being Lilith Gaian whom was the mother of the first Original Vampire and her successor: Cain Edenson, the only time she became a Vampire and the Progenitor Vampire was due to the deep bond between her and her son when Cain became the first Original.