The book The Deplorable word says that the Dark Mother, Choronzon and the Diabolus come from the Void. (do NOT mix up the Void with the Qliphothic realm the Abyss - they are very different animals)
In the book Lilith, the three Morrigan aspects and Tiamat are all aspects of the Dark Mother.
What is your opinion/feeling/experience?
I think many beings/demons/gods/goddesses may not be from here, like for instance Pherishel - a Titan from Titan, that Apollo buried under a mountain to defeat - who claims to have been of Earth for a long time under several guises.