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Duchy of Carinthia Duchy of Oels Duchies in England United Baltic Duchy Duchy of Pomerania-Stolp Grand Duchy of Lithuania Duchy of Löwenberg Duchy of Courland and Semigallia Duchy of Nivernais Duchy of Brabant Duchy of Cleves Duchy of Styria Duchy of Massa and Carrara Duchy of the Archipelago Grand Duchy of Würzburg Duchy of Reggio Duchy of Bernstadt Duchy of Żagań Duchy of Neopatras Duchy of Racibórz Duchy

of Akhalkalaki Duchy of Benevento Duchy of Siewierz Grand Duchy of Finland Duchy of Naples Duchy of Pomerania Duchy of Syrmia Duchy of Brunswick-Lüneburg Duchy of Opole and Racibórz Duchy of Oświęcim Duchy of Kldekari Duchy of Łęczyca Duchy of Brzeg Grand Duchy of Hesse Grand Duchy of Kraków Duchy of Limburg (1839–1867) Duchy of Gascony Duchy of Tskhumi Duchy of Croatia Duchy of Belz Grand Duchy of Mecklenburg-Strelitz Duchy of Głubczyce Duchy of Opole Duchy of Orléans Duchy of Tridentum Duchy of the Pentapolis Duchy of Friuli Duchy of Sorrento Duchy of Milan Duchy of Kraków Grand Duchy of Baden Partitions of the Duchy of Pomerania Ernestine duchies Duchy of Friedland Duchy of Amalfi Duchy of Brittany Duchy of Ba