David J. C. MacKay
Sir David John Cameron MacKay, FRS, FInstP, FICE was a British physicist, mathematician, and academic. He was the Regius Professor of Engineering in the Department of Engineering at the University of Cambridge and from 2009 to 2014 was Chief Scientific Adviser to the UK Department of Energy and Climate Change . MacKay was well known as author of the book Sustainable Energy Without the Hot Air.
MacKay was born the fifth child of Donald MacCrimmon MacKay and Valerie MacKay. His elder brother Robert S. MacKay FRS is Professor of Mathematics at the University of Warwick. MacKay was a vegetarian.
Source: Wikipedia