Suggestion:
I heard Tom say there will be custom titles for duchies, i believe it would be interesting to be able to have custom titles for dukes as well.
Example:
Kepler Nosferatus
Duke of Kepler City(region lord title), Governor(duke title) of the Duchy of Keplery(duchy name)
You have it backwards. It should be:
Kepler Nosferatus
Duke of Keplery, Governor of Kepler City