Alan Mathison Turing was born June 23, 1912 in
His father, Julius Turing, born November 9, 1873,
was second son of John Robert Turing.
As a result, Julius
had become an officer of the Indian civil service and was
still employed at the time of Alan’s birth.
Part of Alan’s
mathematical skill was a result of his grandfather, John,
and his mother, Ethel Sara Stoney, later Turing, who was
born at Podanur, Madras November 18, 1881.
grandfather, John Turing, had earned a degree in
mathematics at Trinity College, Cambridge in 1848.
the mathematical gene had skipped Alan’s father, Julius,
Alan himself was interested in figures very early on in his
life, his mother noting so “even before he could read”.
March of 1913, after Alan’s birth, Julius Turing returned
to Madras leaving his wife in England with Alan and Alan’s
older brother, John who was four at the time.
same year in September, Ethel went to join her husband in
Madras and left her two boys in England with a retired Army
The Man Who Knew Too Much
(New York: W. W. Norton,
Alan Turing: The Enigma
(New York: Simon and Schuster,