Ivan Efimovich Orlov was a Russian philosopher, a forerunner of relevant and other substructural logics, and an industrial chemist. The date of his death is unknown, but is most likely between 1936 and 1937.
Ivan Dmitrievich Papanin was a Soviet polar explorer, scientist, Counter Admiral, and twice Hero of the Soviet Union, who was awarded nine Orders of Lenin.
Ivan Parfenievich Borodin was a Russian botanist, academician, and the founding president of the Russian Botanical Society of the Russian Academy of Sciences. He campaigned for the protection of natural spaces.
Ivan Petrovich Pavlov was a Russian and Soviet experimental neurologist and physiologist known for his discovery of classical conditioning through his experiments with dogs.
Ivan Semyonovich Peresvetov was a medieval Russian political thinker and progressive social critic, who wrote during the reign of Ivan the Terrible. Among the works he is most known for is The Tale of Mehmet the Sultan, a political allegory prescribing strong autocratic governance.
Ivan Yuriyovych Petrovtsii was a Rusyn poet, editor and translator. Born in Transcarpathia, he worked as a soldier and laborer before studying the French language at Uzhhorod State University, where he graduated in 1973. After several years as an elementary school teacher, he became a journalist, but also began writing Ukrainian-language poetry. During the collapse of the Soviet Union, he became active in the Rusyn cultural movement and began writing in Rusyn. One of his collections, Nashi spivanky, sparked outrage after its publication in 1996 due to its obscene language and condemnation of the newly-independent Ukrainian government; the book was condemned by the national press, as well as by president Leonid Kuchma. Petrovtsii continued to publish Rusyn poetry collections over the following years.
Ivan Petrovich Pnin was a Russian poet and political writer. In accordance with Russian Illegitimacy custom, Pnin's surname was the abbreviation of that of his father, Prince Nicholas Repnin.
Ivan Stepanovich Prokhanov was a Russian, Soviet, and emigre religious figure, engineer, poet, preacher, theologian, and politician. Brother of the Molokan theologian Aleksandr Prokhanov, father of the botanist Yaroslav Prokhanov Yaroslav Prokhanov, great-uncle of the writer Alexander Prokhanov.
Ivan Ivanovich Pushchin was a Russian civil servant and Decembrist. In school, he became a close friend of the writer, Alexander Pushkin, due to the similarity of their names.
