Eva Aurora Charlotta Karamzin née Stjernvall, (1/7 August 1808 – 13 May 1902) was a Finnish Swede philanthropist. She was the founder and supporter of various charities. She was best known as Princess Aurora Demidova and Aurora Karamzina, the names and title she acquired after her first and second marriages, respectively.
She was born in Björneborg (now Pori), Finland, as daughter of Lord Carl Johan Stjernvall (Maaskeskis, Padasjoki, Häme, 10 September 1764 - Vyborg (now Viipuri), 6 February 1815), a high official of the Grand Duchy of Finland's administration, ultimately Governor of the Viipuri Province. Her mother, whom he married in Åbo or Turku on 2 August 1799, Baroness Eva Gustava von Willebrand (Finland, 18 February 1781 - 1 December 1844, a remote niece of Gustav I, King of Sweden), was soon widowed, and became the wife of Carl Johan Walleen, Lord Procurator of Finland.
Aurora had an older brother, Emil (1806-1890) and two sisters, Emilie (1811-1846, married Vladimir Musin-Pushkin) and Alexandra (Aline) (Vyborg (now Viipuri), 4 October 1812 - Lisbon, 1 January 1851), married on 4 August 1839 as his second wife José Maurício Correia Henriques, 1st Baron, 1st Viscount and 1st Count de Seisal (5 November 1802 - 7 February 1874, married firstly on 2 December 1820 to Adèle Louise, Comtesse de Paoli-Chagny (5 February 1799 - 10 April 1838), by whom he had one daughter), a Portuguese Diplomat, created the 76th Commander of the Royal Order of Our Lady of the Concepcion of Vila Viçosa (6 July 1836) - a natural son of Azorian Liberal José Anselmo Correia Henriques (died in exile in Paris, 1831) -, by whom she had issue. She had also three half-brothers from her mother's second marriage. Her brother Emil Stjernvall-Walleen became Minister State Secretary for Finland and was baronized.
Aurora was appointed a lady-in-waiting of Empress Alexandra Fedorovna the elder, consort to Emperor Nicholas I of Russia and a lady of the bedchamber of their Imperial Majesties Empress Alexandra Feodorovna the younger and Empress Maria Feodorovna. She was made a dame of the Order of Saint Catherine, the highest honor for ladies in Imperial Russia. Evgeny Baratynsky dedicated a poem to her both in Russian and French ("Go and breathe inspiration into us, you the namesake of dawn... for whom you will become the sun of happiness?"), as did to her sister Countess Emilia Musin-Pushkin Mikhail Lermontov. An impoverished beauty, she was married in Helsinki on 9 January 1836 to Prince and Count Pavel Nikolaievich Demidov (1798-1840), a scion of a Russian family whose immense wealth was derived from mines in Nizhni Tagilsk, Ural. Her husband died in 1840, and six years later, she married a Russian officer, Colonel Andrei Nikolaievich Karamzin, son of the historian Nikolai Karamzin, who died in the Crimean War in 1854.
After the death of her second husband, she occupied herself with the practical matters of her Järvenperä manor in Espoo, Finland, and with her growing interest in charity. Aurora used her immense wealth, inherited from her first husband, to create benefactory institutions in Helsinki, such as schools, public kitchens, and the Deaconess Institution of Helsinki. She was a great benefactor in many cities such as St. Petersburg and Florence.
Aurora's only child was Prince Pavel Pavlovich Demidov (9 October 1839 – 26 January 1885). In 1870, he succeeded his childless uncle, Anatoly Nikolaievich Demidov, as the 2nd Prince of San Donato.
Her granddaughter and namesake Princess Aurora Pavlovna Demidova married Arsen Karađorđević, Prince of Serbia and became the mother of the Yugoslav Regent, Prince Paul of Yugoslavia. Aurora of Yugoslavia's granddaughter is Princess Elizabeth of Yugoslavia, a politician in Serbia and the mother of actress Catherine Oxenberg.
She died in Helsinki.