The son of James Thomas Oppy (1893–1935) and Doris Edna Oppy, née Watson (1895–1967), William Maxwell Oppy, known as "Max", was born on 14 October 1924.
William Maxwell Oppy, who is referred to as Max, was born to James Thomas Oppy and Doris Edna Oppy (née Watson) on October 14, 1924. He is the son of James Thomas Oppy (1893–1935) and Doris Edna Oppy, née Watson (1895–1967).