John Jeffreys

John Jeffreys may refer to:

John R. F. Jeffreys, British mathematician and World War II codebreaker
John Gwyn Jeffreys, British conchologist and malacologist
J. G. Jeffreys, Australian schoolteacher who moved to England and founded Bryanston School in Dorset
John Jeffreys, British Member of Parliament for Brecon and Breconshire
John Jeffreys , British Member of Parliament for Breconshire, Marlborough and Radnorshire
John Jeffreys, British Member of Parliament for Breconshire and Dartmouth