Yevgenia Schwartz (1929-2012) – Professor, Habilitated Doctor of Chemistry (Dr. habil. chem.), specialist of the field of Borium chemistry and its compounds. >>

Gilel Segal (1931-2003) – professor, hydraulic engineer, habilitated doctor of engineering sciences (Dr. habil. sc. ing.), academician of the Latvian Academy of Agricultural and Forestry Sciences. >>

Anna Segediy (nee Lishina; 1896-1944) –  a teacher of Russian and German. >>

Pavel Selivanov (1952) – as member of the USSR volleyball team became Olympic Champion in 1980. >>

Lidia Semyonova (1925-2015) – Docent of the Chair of Material Engineering of the Riga Polytechnic Institute from 1968 to 1990. >>

Maria Semyonova (1910-1988) – Docent of the Faculty of Philology of the Latvian State University, Candidate of Philological Sciences. Specialist in the field of dialectology and comparative grammar of the Russian and Latvian languages. >>

Ulyana Semyonova (1952) – as a member of the USSR basketball team twice won the Olympic gold medals (1976, 1980). The best Latvian basketball player of the 20th century. >>

Yakov Serafimov (1884-1949) – a teacher  of Math at the Riga city Russian gymnasium (former Lomonosov). >>

Julia Serafimova (born Baskakova; 1887-?) – a singer and vocal teacher, adocnt of the Latvian Conservatory. >>

Seraphim (secular name Semyon  Protopopov; 1818–1891) –  a bishop of Riga and Jelgava (1874-1877). >>