William MASON's parents: John MASON (1859-1938) and Margaret DRINKALL (1860-1940)

William MASON's siblings: James MASON (1884- ), Thomas MASON (1885- ), Richard Eglin MASON (1889- ), Edith MASON (1891-1973), George Drinkall MASON (1893-1959), Margaret Ellen (Madge) MASON (1895- ), Elizabeth MASON (1898- ) and John MASON (1900- )