In my most recent playthrough of Long Live the Queen, I managed to get six of my dukes/duchesses killed, and another stripped of her title (I also killed some other nobles). In addition to the natural transition of power in Sudbury, this means only three duchies ended the game with the ruler they started with. Does anyone know if this is the highest possible total?

good game! i didn't realise it was possible to kill off most of the nobles. "best " i got was killing off the step-mother of my 12 year-old fiance.