Ernst Werner Siemens (13.12.1816-6.12.1892) — a German physicist, electrical engineer and entrepreneur, a member of the Berlin Academy of Sciences (1874).
Kirill Dmitriyevich Sinelnikov (29.05.1901 — 16.10.1966) — a Soviet experimental physicist, an academician of the Academy of Sciences of the Ukrainian SSR (1948).
Adrian Anatolyevich Smirnov (born 16.02.1908) — a Soviet theoretical physicist, an academician of the Academy of Sciences of the Ukrainian SSR (1967), vice-president (1970-74).
Frederick Soddy (2.09.1877-22.09.1956) was an English physicist and chemist, one of the pioneers of radioactivity, and a Fellow of the Royal Society (1910).