A couple of things spring to my mind- One has been mentioned earlier in this thread, kind of, inreference to The Red Wedding, but in the flaying of their enemies, it seems to me that the Boltons equivalents to the Tepes dynasty in Wallachia, led of course by the infamous Vlad the Impaler (he even had a son who was kind of Ramsay-ish). The fact that the Boltons contested the title of King in the North with the Starks in earlier days also echoes the fact that Vlad fought several wars with other Wallachian nobles for the throne. The second thing I thought of was the bit when Jaime is convincing Loras about the worth of the knights in the White Book, and one of them was called 'The Kingmaker'- Robert Neville, Earl of Warwick, The Kingmaker, was a key figure in the Wars of the Roses, one of Martin's acknolwedged inspirations for the series.
