 Voyk 's son , John Hunyadi , bore the nickname " Olah " , meaning " Vlach " , in his youth , which implied that he was of Romanian stock . The court historian of Voyk 's grandson King Matthias Corvinus , Antonio Bonfini , explicitly stated that John had been " born to a Vlach father " . Holy Roman Emperor Frederick III likewise knew that King Matthias had been " born to a Vlach father " , and a Venetian man , Sebastiano <unk> , referred to the Romanians as King Matthias 's people . 
