Eva Aurora Charlotta Karamzin (née Stjernvall) (1 / 7 August 1808 – 13 May 1902), was a Finnish-Swede philanthropist. Her better-known names are Princess Aurora Demidova and Aurora Karamzin, titles that were acquired after her first and second marriages, respectively.
She was born in Ulvila, in Saaren Kartano, Finland. She was the daughter of Carl Johan Stjernvall (1764–1815) and Baroness Eva Gustava von Willebrand (1781–1844). Her father was a high official in the Grand Duchy of Finland and became the First Governor of the Viipuri Province in 1812. Following Stjernvall's death in 1815, the Baroness remarried and became the wife of Finland's Procurator, Carl Johan Walleen.
Karamzin had an older brother, Emil Stjernvall Walleen (1806–1890) who became a Finnish Minister of State and a Baron. Karamzin also had two sisters, Emilia (1811-1846) and Alexandra "Aline" (1812-1851). Emilia married Vladimir Musin-Pushkin while Alexandra became the second wife of José Maurício Correia Henriques, 1st Count de Seisal. Karamzin also had three half-brothers from her mother's second marriage, however, little is known about them.
Aurora was appointed as a lady-in-waiting to Empress Alexandra Fedorovna the elder (consort to Tsar Nicholas I of Russia), and a lady of the bedchamber of Empress Alexandra Feodorovna the younger and Empress Maria Feodorovna. She was made a dame of the Order of Saint Catherine, the highest honour 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 he did to her sister Countess Emilia.
In Helsinki on 9 January 1836, she married Pavel Nikolayevich Demidov (1798 - 1840). In 1846, after Demidov's death, she remarried to Andrei Karamzin. After the death of Aurora's second husband, she occupied herself with the practical matters of her Järvenperä manor in Espoo, Finland and with her growing interest in charity. Karamzin used the immense wealth inherited from her first husband) to create benevolent institutions in Helsinki, such as schools, public kitchens and the Deaconess Institution of Helsinki. She was considered a great benefactor in many cities such as Saint Petersburg and Florence.