Duchies are provinces ruled by a Duke which contain Earldoms and Baronies.
“Stardock is the name given to both the island and town which reside in the middle of The Great...Stardock
“Bas-Tyra is a Duchy immediately north of Rillanon, on the shore rather than the island, a part...Bas-Tyra
“Yabon is a Duchy in the north of the Kingdom. Its vassal states are LaMut (Earldom), Loriél...Yabon