John William Francis O'Brien was born 1910 in Victoria, Australia to Francis Theodore O'Brien (-1958) and Arvilla Isabel Mills (1887-1945) and died 29 June 1980 Goulburn, New South Wales, Australia of unspecified causes. He married Gladys Leila Cramp (1912-2001) 6 July 1929 in Goulburn, New South Wales, Australia.
|Offspring of John William Francis O'Brien and Gladys Leila Cramp (1912-2001)|
|Reginald Francis O'Brien (1929-)|
|Doreen Patricia O'Brien (1931-)|
|Joan O'Brien (1933-)|
|John Dennis O'Brien (1946-)|
|Denis O'Brien (1948-)|
|Annette Isobel O'Brien (1950-1971)||9 January 1950||26 August 1971 Sydney, New South Wales, Australia|