@Witch Cat Thanks for the effort, but I really don't like it. First, i feel like making this legend about Lilith is misogynistic. You could probably equally develop a myth starting from Kain. Secondly, how can you have "alive" vampires? You can't make life if you are dead... then you also get the problems with half breeds and quarter breeds, and eventually vampires get bred into non-existence. Lastly, it's just not right to be both immortal AND be able to have a family. That causes population problems.... and I don't like having two specific kinds of vampires either. :P
But that's just my opinion.
Guess I'll explain a few points. The Lilith myth is an actual myth, so no changing that. And vampires are technically alive. They are alive but appear dead. However, vampire minions are dead, and appear dead. The only thing keeping them alive is magic. Magic is their new blood, and thus preventing stuff like rigirmotis, and the loss of hunger, etc. And not every member of a vampire lineage will be a vampire. Think of vampirism as colour-blindness. People can carry the gene for colour blindness, but aren't affected by it. And if a vampire becomes a problem, they can be killed. They are immortal, not invincible. Vampires can be raised from the dead though, but they will just be a vampire minion and not their original self.