Léon Nicolas Brillouin (August 7, 1889 – October 4, 1969) was a French physicist. He was born in Sèvres, France. His father,
Marcel Brillouin, grandfather, Éleuthère Mascart, and great-grandfather, Charles Briot, were physicists as well. He made contributions
to quantum mechanics, radio wave propagation in the atmosphere, solid state physics, and information theory.
Charles Friedel (12 March 1832 – 20 April 1899) was a French chemist and mineralogist. A native of Strasbourg, France, he
was professor of chemistry at the Sorbonne. Friedel developed the Friedel-Crafts alkylation and acylation reactions with James
Crafts in 1877, and attempted to make synthetic diamonds. His son Georges Friedel (1865 – 1933) also became a renowned mineralogist.
