Duke George of Oldenburg
Duke George of Oldenburg was a younger son of Peter I, Grand Duke of Oldenburg and his wife Duchess Frederica of Wrttemberg. He was a soninlaw of Paul I of Russia through marriage to his daughter Grand Duchess Catherine Pavlovna of Russia. He was referred to as a prince in Russia, Prince Georgy Petrovich Oldenburgsky.
George was born onMay 1784 to the then Prince Peter Frederick Louis of HolsteinGottorp and his wife Duchess Frederica of Wrttemberg, a daughter of Frederick II Eugene, Duke of Wrttemberg.
Source: Wikipedia