So apparently Valvasor was the first person to describe vampires in print? observer. com/2017/10/history-of-vampires-johann-weichard-valvasor/
Yes! And Jure Grando is indeed considered to have been the earliest reported case of vampirism that we know of (you could say that he’s the prototype of “vampires” as we know them through popular culture today). He lived in the part of Istria that is now part of Croatia but yeah, I totally forgot it was Valvasor who described it!