Dracula
Dracula is an historic person, It was the nickname for Vlad the Impaler. He really lived. So the name "Dracula" is in the public domain.
As for the novel, remember that when Murnau wanted to film Bram Stoker's novel "Dracula" he was unable to get copyright clearance from Stoker's widow. So Murnau simply changed the name to "Nosferatu" and went ahead.
But the Stoker novel "Dracula" is now in public domain, I think. Regardless, a printed copy of Dracula published, say, by Random House, would be copyright. That is, the text itself is copyright, so you would not be permitted to cut and paste.
But to use the character of Dracula in your book? Go for it.