My concern goes to the High Lordship of Rosby, Bronn in the A Feast for Crows scenario starts as a vassal to Duke Gyles of Rosby, but it is possible to conquer your way to his High Lordship title as Bronn. I have done it several times. My question is though, if Bronn would have aquired the whole area of Rosby in the books would he have been called Lord Rosby or would he have changed the High Lordship title to his own, Blackwater? Because when you look at the history of that title only Rosby's have ruled and the Septry too is also called Rosby. But if a new dynasty would have taken over would they have kept 'Rosby' as the the name?