Also, people with a second duke on the same continent... I am sorry but there has way too many cases of the same family holding two ducal or two vital lordship positions over the years.
That's what we wanted to prevent in our realm on FEI at least; until we spent a few weeks without a banker and thus my second character was more or less forced into the role to prevent the realm from taking damage from the lack of willingness from other players to take responsibility. Said character is the banker of the realm and holds a second city region in my realm. Both are technically against the law in the realm but until more people show up who are willing to take such positions of power and responsibility we've been forced to utilize it. We've been actively trying to grant our newer nobles positions of lordship but they lack the mandatory honor/prestige requirements at this time. (That and the city my second character holds is notoriously annoying to keep in check, I have the secondary character doing extensive maintainance on a daily basis or the city destabilizes and causes trouble in the space of 2-3 days while she does her bankery business in her study....) Oh well, it'd be nice if people'd come on over and live with us in FEI... it's fun and my character still have cake and tea on offer. >_>; And Lordships; we got plenty of those as well. :p
