Alright, I'll buy that.
But how to we get the name Vlad Tepes III then?
Vlad Tepes Dracula(or in the order of "Dracula Vlad Tepes" in SotN). I don't recall(or remember, since some of my memory is fuzzy about certain games) him being called Vlad III in the games. Almost always just "Dracula". And "Dracula", "Vlad" and "Tepes" all are symbolic in meaning. "Dracula" means "Son of the Dragon", which can also mean "Son of the Devil"(as the Devil is represented as the "Red Dragon" in Revelations and "dragons" in Christianity are identified with the Devil). "Vlad" means "Prince". "Tepes" means "Impaler".
Who has a castle in Romania no less (as proven by Bloodlines and SotN).
I don't think you can work with a character of Dracula that doesn't live in Romania or have ties to Romania.
If he was a vampire before the 15th century, does that mean that he WASN'T at one point the King of Wallachia?
We don't know how long he had his castle there, nor how long it was prior to that when he started to settle the area. If we went by CV history, our Vlad III would've been a vampire throughout his rule(and everything regarding his childhood would've been concocted by the Church to cover up him being "The Dark Lord". What we do know is, in CV, during the time that Dracula was suposed to be fighting the Turks in OUR world, nothing happened like that in CV's world. The major threat to Romania, and Europe in general, was when Dracula waged war on humanity(CV3). The CV series, in most titles, never even gave any indication that Romania was at constant war with the Turks. The only game that talked anything about such similar battles was LoI regarding the Crusades. But, other than that, it seems like in CV's world, Romania was peaceful in the periods when Dracula was dead. And even events that are tied to reality (WWI, for instance) are, in the CV series, tied to that fiction. In CV's world, Elizabeth Bartley's responsible for igniting WWI. That's pretty bogus in terms of realism.

- John