Elizabeth Bathory
From Tardis Wiki, the free Doctor Who reference
Elizabeth Bathory was a murderous Hungarian queen residing in Prague, Czechoslovakia. It was rumoured that she slaughtered over six hundred fifty individuals, most of them young girls. A terrible rumour was spread that she bathed in their blood. In 1610, Francis Pearson and Edward Kelley met in Prague and visited her castle. (PROSE: Managra)
John Carter and Wayne Carter were students of hers, and became murderers known as the Royal Street Vampires. (PROSE: The Sideways Door)