Duke Alexander Petrovich of Oldenburg [SEP] mother
Duke Alexander Petrovich of Oldenburg
Duke Alexander Friedrich Konstantin Petrovich of Oldenburg (, Alexander Petrovich Oldenburgsky; 2 June 1844 – 6 September 1932) was the second son of Duke Peter Georgievich of Oldenburg and his wife Princess Therese of Nassau-Weilburg. Though he had a German title and ancestry, Alexander and his siblings were born and raised in St. Petersburg as the grandchildren of Grand Duchess Catherine Pavlovna of Russia.
Alexander served as Adjutant general to Alexander III of Russia, and also as commanding general of the Imperial Guard.
the grandfather of Prince Maximilian of Baden (1867–1929), Chancellor of Germany during World War I, and Princess Marie of Baden, the last Duchess consort of Anhalt.
His youngest daughter Princess Eugenia Maximilianovna of Leuchtenberg (1845–1925) married Duke Alexander Petrovich of Oldenburg (1844–1932), the grandson of Grand Duchess Catherine Pavlovna of Russia, and became the mother of Duke Peter Alexandrovich of Oldenburg (1868–1924), the divorced husband of Grand Duchess Olga Alexandrovna of Russia (1882–1960), the youngest sister of Nicholas II of Russia