Alucard. As in Dracula? That's... well, it's not a myth if you know him personally, but even being of his ilk, I never believed in him. Your said he was bound to your family, somehow? I have heard of binding spells like that, but binding someone like Dracula would require much more than a simple binding spell.
By the way, my name is Bill Turner. I'm something of a collector. I've spent my unlife in collecting knowledge on the arcane, magical, and paranormal. I assure you that I'm benign, as is my sire. I've become friend to many Hunters in need. If you'd like, you could have access to my library.