Leonilla, Princess of Sayn Wittgenstein Sayn. Leonilla Ivanovna Bariatinskaya, Princess of Sayn-Wittgenstein-Sayn, was a Russian aristocrat who married Ludwig, Prince of Sayn-Wittgenstein-Sayn.
She was the subject of a number of portraits by Franz Xaver Winterhalter. Princess Leonilla Ivanovna Bariatinskaya was born on 9 May 1816 in Moscow.
She was a daughter of Prince Ivan Ivanovich Bariatinsky, a member of one of the most influential families of the Russian nobility, and granddaughter of Princess Catherine of Schleswig-Holstein-Sonderburg-Beck. Her mother was Countess Marie Wilhelmine von Keller, daughter of Count Christoph von Keller, a German politician, and Countess Amalie Louise zu Sayn-Wittgenstein-Ludwigsburg.
On 23 October 1834, Leonilla married her cousin and one of the Tsar's aides de camp, Prince Ludwig zu Sayn-Wittgenstein-Berleburg, at Castle Marino, Kursk Governorate. Ludwig was a Russian aristocrat of German descent, who was known in Russia as Lev Petrovich Wittgenstein.
He was the eldest son of Peter, 1st Prince of Sayn-Wittgenstein-Berleburg-Ludwigsburg, and a Polish noblewoman, Antonia Cecilie Snarska. Ludwig had been previously married to Princess Stefania Radziwill, who bequeathed to him, on her early death, a large estate in central Europe and two children: Peter, and a daughter Marie, who married Prince Chlodwig zu Hohenlohe-Schillingsfirst, Chancellor of the German Empire. Leonilla and Ludwig had fo