Sidney Poitier | Sidney Lumet | Sidney Nolan | Sidney Bechet | Philip Sidney | Sidney Crosby | Albert Sidney Johnston | Sidney Herbert, 1st Baron Herbert of Lea | Sidney | Johann Gottlieb Fichte | Sylvia Sidney | Sidney Reilly | Sidney Altman | Sidney Paget | Sidney Howard | Sidney Colvin | Henry Sidney | Gottlieb Daimler | Gottlieb Christoph Harless | Carl Gottlieb | Sidney Smith | Sidney Lee | Sidney Godolphin, 1st Earl of Godolphin | Sidney Cotton | Sidney Blumenthal | Harry Gottlieb | Friedrich Gottlieb Klopstock | Donald Sidney-Fryer | William Sidney, 1st Viscount De L'Isle | Sidney Sheldon |
According to author Gordon Thomas' 2007 book, Secrets and Lies, the CIA's Operation Often was also initiated by the chief of the CIA's Technical Services Branch, Dr. Sidney Gottlieb, to "explore the world of black magic" and "harness the forces of darkness and challenge the concept that the inner reaches of the mind are beyond reach".