Stoker was a friend of a Hungarian professor ( Arminius Vambery\/Hermann Vamberger ) from Budapest , and many have suggested that Vlad 's name might have been mentioned by this friend . It is also suggested by some that because Stoker was a friend of a Hungarian professor ( Ã rmin VÃ mbÃ ry ) from Budapest , Vlad 's name might have been mentioned by this friend .