I get to write about Dracula's vampire "sisters" today. They are commonly referred to as The Brides of Dracula, though the perv who came up with this was wrong. They're never referred to as "brides" in the novel. They don't even have names, and it is not clear if they are Dracula's sisters or just sisters. All we can do is ask Stoker, but that would involve raising him from the grave.
The illustration above is done by Jae Lee, a fantastic comic artist who I think captured the mood of these characters better than the typical gory kitschy representation of them.