Boris Pavlik (1940) –  Docent, Head of the сhair of  Machinery technology of the Riga Polytechnic Institute (from 1990 – Riga Technical University). >>

Ivan Petrov (1941–2021) – Candidate of Tetcnical Sciences, senior researcher of the Riga Polytechnic Institute. >>

Vladimir Pirogov (1932–2010) – a Correspondent-member of  Latvian Academy of Sciences (1968), Habilitated Doctor of Computer Science (Dr. habil. sc. comp). Professor of the Riga Polytechnic Institute >>

Ninel Podgornaya (1930–2015) – a specialist in  Alexander Pushkin studies, collector, writer, researcher of the history of the Romanov dynasty.  >>

Arnold Podmazov (1936–2010) – Doctor of Philosophy (Dr. phil.), specialist in the history of old believer's. >>

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

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. >>