William Llewellyn "Bill" Mountjoy (6 Sep 1932-25 May 1979) was an English-born Drakian property developer and the founder of North Atlantic Properties, Ltd. Within 10 years of founding the company, he had developed much of Glendale and its suburbs, and plans were underway for further development to continue after his sudden death. After his death, Sloan took over the company and ran it until 1984, when Russell Bentley, Mountjoy's nephew, took over the company. Mountjoy married Elizabeth Clifford (1926-1999) in Glendale in 1962; the couple were childless.