This is a very specific historical issue, and might not even be linked to the mod, so please bear with me if this is not the correct thread to report it or if it has been brought up before.
So I've been playing around with the de Hautevilles a lot recently which made me to read up on their fascinating history. There's a character in the game, namely a Roger of Capua, born in 1182 to Counte Simon of Muórica, being chancellor to the young Hohenstaufen king, and having domains in southern Sicily. This makes him the last landed male member of the de Hauteville dynasty around 1200.
The problem is, I couldn't find any historical reference to his existence. My sources are obviously limited, mainly John Julius Norwich's work and other books written in English dealing with the Kingdom of Sicily, none which mention that his father, Simon, Duke of Taranto (which he probably should be in-game after 1144 as well) ever had a son named Roger, or any issue for that matter. By the time of the Fourth Crusade, the daughters of King Tancred should be the last de Hautevilles around. On a sidenote, Aristolf de Hauteville, a landless courtier in the court of Albinia de Hauteville, seems to be fictional as well.
This would also make playing with Albinia de Hauteville much more interesting, attempting to facilitate a comeback of the dynasty to the throne of Sicily with a female character.
But maybe I'm completely wrong, and he actually existed, in which case I'd kindly ask for the source(s) mentioning either him or Aristolf.
Thank you, and, of course, this is a fantastic mod and I really appreciate the amount of work put into it. Congrats!
EDIT: I looked up the character files, and from what I can gather Roger and Aristolf (and his line) haven't been touched upon by the mod, therefore I propose their complete removal. Can't think of a suitable replacement for Roger as the owner of those Sicilian counties though, but maybe someone well versed in Italian/Norman history can.