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. >>

Pyotr Prokofyev (1925–2000) – a specialist of Nuclear Physics, Full Member of  Latvian Academy of Sciences. >>

Alexander Pugachev (1912–1994) – Professor, Rector of  the Riga Civil Aviation Engineers Institute    from 1965 to 1972. >>

Vladislav Pugachov (1940) – Habilitated Doctor of Engineering,  noted specialist in the field of research of electrical machines, magnetic fields and constant magnets. >>

Valentina Pugo (1938–1991) – Candidate of Technical Sciences, Docent of the Riga Polytechnic Institute, spouse of the former Communist party leader Boris Pugo (1937–1991). >>

Nadezhda Pugasey (1926–?) – Candidate of Technical Sciences, Docent of the Chair of Light Industry Machinery and Technology at the Riga Polytechnic Institute. >>