Olga Poplyayeva (1929–2021) –  teacher  of Russian and literature in the schools of Riga from 1951 to 1987. >>

Boris Popov (1871–1950) – Professor of the Chair  of  Mineralogy of the Faculty of Chemistry of the University of Latvia from 1920 to 1944. >>

Georgy Popos (1955-2024) – an archpriest. >>

Nikolay Popov (1884–1948) – professor, director of the Russian Institute of University  knowledge in Riga. >>

Valentin Popov (1937) – Hab. Doctor of physics (Dr. habil. phys.), Professor of the Riga Technical University, professonal musician-singer (lyric-dramatic tenor). >>

Viktor Popov (1932–2008) – Doctor of Medicine. Initiated the creation of the Baltic-Slavonic Society, which he chaired from 1989 to 1996. Published the «Church and the World» (Церковь и мир) newspaper. >>

Alexander Porokhovshchikov (1892–1941) – he tested one of the first Russian aircraft in Riga in 1911, and  the first tank in 1915. Shot in Moscow in 1941. >>

Konstantin Portnov (1908–1943) –  a teacher, old-believer`s public figure, teacher of clerical law, anti-fascit. Shot by the Nazi. >>

Komita Portnova (born Yershova;1901–1943) – a teacher, anti-fascist, shot bu the Nazi. >>

Stepan Posevin (1880–1941) – an officer or Russian and Latvian  army, author of some books. In 1940, Stepan Posevin was arrested by the NKVD and shot on April 3, 1941. >>