Joseph Larmor (11.07.1857-19.05.1942) was an English theoretical physicist and mathematician, a Fellow of the Royal Society (1892) and in 1912-14 its vice-president.
Antoine Laurent Lavoisier (26.08.1743-8.05.1794) was a French chemist, one of the founders of chemistry, and a member of the Paris Academy of Sciences (1772).
Boris Georgiyevich Lazarev (born 6.08.1906) is a Soviet experimental physicist and an academician of the Academy of Sciences of the Ukrainian SSR (1951).