Duke Constantine Petrovich of Oldenburg
Duke of Oldenburg (1850-1906) · Russia · On the map · Died at 55
Duke Constantine Frederick Peter of Oldenburg was the youngest son of Duke Peter Georgievich of Oldenburg and his wife, Princess Therese of Nassau-Weilburg. Known in the court of Emperor Nicholas II as Prince Constantine Petrovich Oldenburgsky, he was the father of the Russian Counts and Countesses von Zarnekau.
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