My friend, it's actually world history. Nobody ever recognizes the name simply because the descendant of the Dracul ended up being more famous.
Hell, we're even talking about Dracula, THE Dracula from Bram Stoker, one of the most famous pieces of literature and used extensively through the media (series, films, cartoons, comics, novels, games, etc).
Here, I'll leave you the link to one of my favourite videos covering the topic: