Lionel Penrose British psychiatrist, medical geneticist, mathematician, and chess theorist (*1898 – †1972) (1898–1972) Parents Elizabeth Josephine Peckover James Doyle Penrose Children Roger Penrose Shirley Hodgson Oliver Penrose Jonathan Penrose Siblings Bernard Edmund Penrose Alexander Peckover Doyle Penrose Roland Penrose Partners Margaret Leathes