I stand by my opinion that Vlad III never existed on the Castlevania's universe, and is likely* a character fabricated by the Church to close the hole that a vampire-demon lord left on history.
The evidence: Dracula's official full name is "Dracula Vlad Tepes" and we know very well that "Tepes" wasn't Vlad III's name nor is the word an actual, real-world name.
One may argue that he could've changed names to wage war on mankind and was simply "Vlad III" before, but this is not true. Alucard's true name is "Adrian Fahreinheit Tepes" and this name was obviously given to him before the war started, which goes to show that Dracula wore the name "Tepes" WAY before the war after all. So, if he was "Tepes" he couldn't be "Vlad III" as Vlad III wasn't called "Tepes" until well after his death (almost 100 years later). And again, the addition of "Tepes" wasn't as a name, but as an adjective. Vlad the Impaler was dubbed "the Impaler" as much as Alexander the Great was dubbed "the Great".
* - "Likely" because the "Vlad III" personality itself is never once uttered anywhere in the game for me to make this assumption. I base it solely on the fact that some geopolitical events depend on the existence of a "Vlad III character" so history is not broken (the very existence of a place named "Romania" itself depends on a "Vlad III" existing at some point).
So, I think trying to reconcile both doesn't work unless we break something. Assuming that "Vlad III" is a character invented to manipulate history to hide Dracula's existence (ensuring that things end up playing out how they did on our world) is a much more elegant solution than trying to fit the real Vlad III in there somewhere with Mathias.
All good points, but I need to quibble with history here.
the very existence of a place named "Romania" itself depends on a "Vlad III" existing at some point
No it doesn't. Vlad the Impaler predates the nation of Romania by centuries. In his time, it was all Hungary. Romania is a modern nation that didn't even exist until the 1880's -- in 1859, Wallachia united with Moldavia to form the United Principalities, which adopted the name Romania in 1866 and officially became the Kingdom of Romania in 1881. Later, in 1918, Transylvania was ceded by the Treaty of Trianon from Hungary to the Kingdom of Romania, forming the modern Romanian state. Dracula had literally no part in forming Romania.
On a side note:
Wallachia existed in Vlad's time, but the real world Dracula would have never been a Count either -- that was something Stoker made up. He might as well have called Dracula an "earl" or a "baron". The real world Vlad was a straight up prince, being descended from a royal family ("Count" being a noble title, not a royal one). Furthermore, his only known wife, Ilona Szilágyi (try pronouncing
that five times fast) WAS a countess by inheritance, but Vlad's title as Prince of Wallachia would have superseded that. She was also Mathias Corvinus' cousin, and this created even stronger royal ties for Vlad's family. Fortunately, all this transpired AFTER Mathias and Vlad reconciled.
In essence, while Konami BEGAN with a Dracula that was in some way inspired both by film and by history, Iga's Dracula was just as made up as Stoker's was, if not more so. He exists only as a good story.
And Gabriel Belmont is notable for being a rehash of that
exact same story that just makes him a composite of both Mathias and Leon to seem original and force a plot twist at the end of the first game.