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of Warsaw (Middle Ages) Duchies in England Duchy of Carinthia Duchy of Oels Duchy of Pomerania-Stolp Grand Duchy of Lithuania United Baltic Duchy Duchy of Courland and Semigallia Duchy of Löwenberg Duchy of Nivernais Duchy of Brabant Duchy of Cleves Duchy of Massa and Carrara Duchy of Styria Duchy of the Archipelago Grand Duchy of Würzburg Duchy of Reggio Duchy of Bernstadt Duchy of Akhalkalaki Duchy of Żagań Duchy of Neopatras Duchy of Naples Duchy of Racibórz Grand Duchy of Finland Duchy of Benevento Duchy of Brunswick-Lüneb

urg Duchy of Pomerania Duchy of Siewierz Duchy of Syrmia Duchy of Oświęcim Duchy of Opole and Racibórz Grand Duchy of Hesse Duchy of Kldekari Grand Duchy of Kraków Duchy of Brzeg Duchy of Limburg (1839–1867) Duchy of Łęczyca Duchy of Tskhumi Duchy of Croatia Duchy of Gascony Duchy of Belz Duchy of Opole Grand Duchy of Mecklenburg-Strelitz Duchy of Tridentum Duchy of Orléans Duchy of Głubczyce Duchy of Sorrento Duchy of the Pentapolis Duchy of Friuli Duchy of Milan Duchy of Kraków Grand Duchy of Baden Duchy of Amalfi Partitions of the Duchy of Pomerania Duchy of Friedland Duchy of Bar Ernestine duchies Duchy of Nysa Duchy of Brittany Duch