Grand Duchess Maria Pavlovna of Russia
Born in Castle Trebschen, in the Prussian Province of Brandenburg (present-day Poland), the daughter of Prince Heinrich IV Reuss zu Köstritz and Princess Luise Caroline Reuss zu Greiz. She was also a younger sister to Prince Heinrich XXIV Reuss of Köstritz and a first cousin to Grand Duchess Maria Pavlovna of Russia. Eleonore's father Heinrich IV and Marie's mother Auguste were brother and sister. She was described as "a plain but practical... capable and kind-hearted woman."