Peter Friedrich Wilhelm, Duke of Oldenburg (born 3 January 1754 at Eutin Castle in Eutin, died 2 July 1823 at Schloss Plön in Plön) was a Duke of Oldenburg. He succeeded his father, Friedrich August I, Duke of Oldenburg as the Duke of Oldenburg in 1785. Wilhelm's mother was Princess Ulrike Friederike Wilhelmine of Hesse-Kassel.
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All Dukes were also by right Princes of Holstein-Gottorp
* may have lost his title due to an unequal marriage |