Rossini (The Masque of Mandragora)
From Tardis Wiki, the free Doctor Who reference
Rossini was the captain of the guard of San Martino in 1492. In the struggle for power between Count Federico and Duke Giuliano, he was loyal to the Count. He often took care of the Count's more "unpleasant" business, and was fully complicit in the efforts to kill the young Duke in order to clear the way for the Count to assume power over the duchy. He was arrested after Federico was killed by Hieronymous. (TV: The Masque of Mandragora)