I have researched a list of historically accurate titles that could be used in the English campaign together with their suggested uses.
I have kept Ireland and Scotland as 'crown lands' and have also added some big titles for the late game when there arent enough family members for every province.
I hope this can be of use to the community.

Early/Mid Game

Titles In game regions

King of England
King of England, Scotland and Ireland

Earl of Hereford - Wales
Earl of Kent - London
Earl of Cornwall - London
Earl of Huntingdon - Nottingham/York
Earl of Dorset - London
Earl of Norfolk - Nottinham/York

Duke of Normandy - Caen
Duke of Brittany - Rennes
Count of Anjou - Angers
Duke of Burgundy - Paris/Rheims
Count of Flanders - Bruges
Duke of Gascogne and Aquitane - Bordeaux
Count of Provence - Marseilles
Count of Toulouse - Toulouse

Mid/Late Game


Count of Barcelona - Barcelona
Duke of Lorraine - Antwerp/Metz
Duke of Arelat* - Dijon
Duke of Swabia - Bern
Duke of Franconia - Frankfurt/Staufen
Duke of Saxony - Hamburg
Duke of Bavaria - Insbruck/Nuremburg
Margrave of Bohemia* - Breslau/Prague
Duke of Austria - Vienna
Duke of Pomerania - Stettin

Viceroy of The Americas
Viceroy of Spain and Portrugal
Viceroy of Italy
Viceroy of Sicily
Viceroy of Sweden
Viceroy of Denmark
viceroy of Norway




* were originally kingdoms but changed for the game