Maria Petrovna Valueva (nee Vyazemskaya) 1813–1849 Source: Wikimedia Commons People from the Same Era Herbert Spencer 1820–1903 anthropologist, biologist, botanist, economist, journalist, philosopher, psychologist, sociologist, writer Derby Henri-Louis Duclos 1815–1900 Catholic priest, art collector, historian Saint-Girons Eugène-Léon Vivier 1817–1900 composer, horn player, writer Brioude Johann Gerhard Erhard Röben 1812–1881 judge, lawyer, politician Norden Charles Upson 1821–1885 judge, lawyer, politician Southington Lajos Kazinczy 1820–1849 military officer, military personnel Széphalom