Natalya Alexeyevna of Russia the siblings had worsened, and she visited her former sister-in-law Eudoxia in her exile. She died of a stomach catarrh in 1716. She is portrayed in the novel "Peter I" by Aleksey Tolstoy. Natalya Alexeyevna of Russia Tsarevna Natalya Alexeyevna of Russia (22 August 167318 June 1716) was a Russian playwright. She was the elder daughter of Tsar Alexis and his second wife, Natalia Naryshkina, and the sister of Peter the Great. Natalia shared the difficulties of her mother and brother during the regency of her half-sister, Tsarevna Sophia. She was very close to her brother Peter, and the siblings
Duke Peter Alexandrovich of Oldenburg Duke Peter Alexandrovich of Oldenburg Peter Alexandrovich of Oldenburg (Duke Peter Friedrich Georg von Oldenburg) (21 November 1868 – 11 March 1924) was the first husband of Grand Duchess Olga Alexandrovna of Russia, the youngest sister of Tsar Nicholas II. He was born in Saint Petersburg, the only child of Duke Alexander Petrovich of Oldenburg (1844–1932) and Eugénie Maximilianovna of Leuchtenberg (1845–1925). His mother was a granddaughter of Tsar Nicholas I of Russia through Nicholas's daughter, Grand Duchess Maria Nikolayevna, and his father was a great-grandson of Tsar Paul I of Russia through his paternal grandmother Grand Duchess Catherine Pavlovna.