Discover the famous people whose name starts with O. The list includes people like O. J. Simpson, Oliver Jackson-Cohen, Oscar Pistorius, Ozzy Osbourne, Olivia Wilde and many more. This list of celebrities is loosely sorted by popularity. People featured on this list, include actors, political leaders, poets and actresses. This list of celebrities whose names start with O includes people from United States, Germany, England, France and many more countries.