I saw the name Matthias Corvinus on wikipedias "On this Day..." and thought I'd check it out.
http://en.wikipedia.org/wiki/Matthias_Corvinus_of_HungaryTurns out, he had ties to Vlad the Third, Prince of Wallachia.
So, I'm guessing this is where Iga, or whoever, got the idea to have Cronqvist and Dracula be the same guy.
Here's the paragraph of his policies of Wallachia and Moldovia
"Policies in Wallachia and Moldavia
At times Matthias had Vlad III Ţepeş, the Prince of Wallachia, as his vassal. Although Vlad had great success against the Ottoman armies, the two Christian rulers disagreed in 1462, leading to Matthias imprisoning Vlad in Buda (according to some sources, Vlad betrayed Matthias)[citation needed]. However, wide-ranging support from many Western leaders for Vlad III prompted Matthias to gradually grant privileged status to his controversial prisoner. As the Ottoman Empire appeared to be increasingly threatening as Vlad Tepes had warned, he was sent to reconquer Wallachia with Hungarian support in 1476. Despite the earlier disagreements between the two leaders, it was ultimately a major blow to Hungary's status in Wallachia when Vlad was assassinated that same year.
In 1467, a conflict erupted between Matthias and the Moldavian Prince Stephen III, after the latter became weary of Hungarian policies in Wallachia and their presence at Kilia; added to this was the fact that Matthias had already taken sides in the Moldavian conflicts preceding Stephen's rule, as he had backed Alexăndrel (and, possibly, the ruler referred to as Ciubăr Vodă), deposing Petru Aron. Stephen occupied Kilia, sparking Hungarian retaliation, that ended in Matthias' bitter defeat in the Battle of Baia in December (the King himself is said to have been wounded thrice)."
I thought it was pretty interesting
Also, I didn't realize Vlad Tepes' actual death is 1476, the same year in Castlevania that Dracula is killed the first time by Trevor Belmont