According to the Post obituary, Graham spent much of his career at the law firm of Williams & Connolly before relocating to Los Angeles to teach trial law at the University of California in Los Angeles.
His brother Donald, who became the publisher and chief executive of The Washington Post when their mother stepped down in 1979, said he died from a self-inflicted gunshot wound.
Graham's father, Phillip, committed suicide when he was 48 by shooting himself with a shotgun in 1963 days after being released from a psychiatric hospital where he was getting treatment for more than a month, according to the New York Post. His mother, Katherine Graham went on to steer the paper as publisher for two decades and played an integral role during their most famous exposé, Watergate.More news: Rosie O'Donnell's Hostile Holiday Response to Paul Ryan
Indeed, Graham did give to charities, according to Donald Graham, who also confirmed to CNN the accuracy of The Post's obituary published on Thursday.
A general view of the exterior of The Washington Post Company headquarters in Washington.
The movie dramatises her struggle, alongside executive editor Bren Bradlee (played by Tom Hanks), to expose a massive U.S. government conspiracy in the early 1970s. He later founded an investment firm, Graham Partners, which he owned and operated for about 20 years until dissolving the business in 2001.More news: PlayStation Plus Free Games For January 2018 Announced
Graham's grandfather Eugene Meyer purchased The Washington Post in 1933, and then handed it over to his father, Philip. In 2013, her heirs sold The Washington Post and several smaller papers to Amazon.com founder Jeff Bezos for $250 million.
William Graham is survived by his wife of seven years, Sally Lasker Graham; two children from his second marriage, Alice Graham and Edward Graham; a sister, Lally Weymouth; and two brothers, Donald E. Graham and Stephen M. Graham.More news: U.S. envoy: Stop calling Judea and Samaria 'occupied'