Alwyn Ann Ruddock (13 April, 1916 – 21 December, 2005) was a noted British historian of the Age of Discovery, best known for her research on the English voyages of the 15th-century explorer John Cabot. Cabot and other English navigators of the time were trying to find lands to the West, such as the mythical "Isle of Brasil" or the North American lands reached by Icelanders in previous centuries.