Julius Mathison Turing father of Alan Turing, English mathematician (1873-1947) (1873–1947) Parents Fanny Montague Boyd John Robert Turing Children John Ferrier Turing Alan Turing Siblings Harvey Doria Turing Sybil Montague Turing Fanny Jean Turing Charlotte Jessie Turing Helen Margaret Turing Arthur Turing Partners Ethel Sara Stoney