| Professor John Langshaw Austin OBE, FBA | Year of birth 1911 | Year of death 1960 | Year elected 1958 | Fellowship category UK |
| Professor Lloyd Austin FBA | Year of birth 1915 | Year of death 1994 | Year elected 1968 | Fellowship category UK |
| Professor Robert Auty FBA | Year of birth 1914 | Year of death 1978 | Year elected 1976 | Fellowship category UK |
| Professor Bertil Axelson FBA | Year of birth 1906 | Year of death 1984 | Year elected 1973 | Fellowship category Corresponding |
| Sir Alfred Ayer FBA | Year of birth 1910 | Year of death 1989 | Year elected 1952 | Fellowship category UK |
| Dr Gerald Aylmer FBA | Year of birth 1926 | Year of death 2000 | Year elected 1976 | Fellowship category UK |