Alfred Ernest Jones (1 January 1879 – 11 February 1958) was a Welsh neurologist and psychoanalyst. A lifelong friend and colleague of Sigmund Freud from their first meeting in 1908, he became his official biographer. Jones was the first English-speaking practitioner of psychoanalysis and became its leading exponent in the English-speaking world. As President of both the International Psychoanalytical Association and the British Psycho-Analytical Society in the 1920s and 1930s, Jones exercised a formative influence in the establishment of their organisations, institutions and publications.