Grand Duchess Maria Pavlovna of Russia
Marianne von Pistohlkors thus became, at age 15, a countess, and later the daughter of a princess. Upon the Grand Duke's return from France to St. Petersburg in 1905, Marianne also gained two siblings, children of her stepfather's first marriage, whom she had not previously known: a step-sister, Grand Duchess Maria Pavlovna of Russia, and a step-brother, Grand Duke Dimitri Pavlovich of Russia.