Vlad Ţepeş (c. 1431–1476), the Impaler, Prince of Wallachia (r. 1456–1462), who inspired the name of the vampire in Bram Stoker's (1847–1912) novel Dracula (1897).
Portrait of Vlad Ţepeş (c. 1431–1476), engraving, 15th century, unknown artist; source: University of Texas Libraries, The University of Texas at Austin, http://legacy.lib.utexas.edu/exhibits/portraits/index.php?img=382.