John Henry Mackay (February 6, 1864 – May 16, 1933) was a Scottish-German egoist anarchist, thinker and writer. Born in Scotland and raised in Germany, Mackay was the author of Die Anarchisten (The Anarchists, 1891) and Der Freiheitsucher (The Searcher for Freedom, 1921).
Later in life, under the pseudonym Sagitta, he became an advocate for homosexual love between men and boys.
Arthur Berriedale Keith (5 April 1879 – 6 October 1944) was a Scottish constitutional lawyer, scholar of Sanskrit and Indologist. He became Regius Professor of Sanskrit and Comparative Philology and Lecturer on the Constitution of the British Empire in the University of Edinburgh. He served in this role from 1914 to 1944.
Prof Hyman Levy (28 February 1889 – 27 February 1975) was a Scottish-Jewish philosopher, Emeritus Professor of Imperial College London, mathematician, political activist and fellow of the Royal Society of Edinburgh.