I've had this name for decades. When I came up with it in the early 90s (God I feel old) Bram Stoker's Dracula had a major hand in making vampires popular during that time. So I took Vlad from Vlad the Impaler and added the suffix -eon to it which indicates that I'm a descendent of Vlad the Impaler. I've had it ever since. I've seen maybe two other people use it since I've been using it but so far it's pretty unique.