His father, known as Dede because those were the only two letters of the alphabet that his illiterate father knew how to write, was a drunkard who worked as a metalworker.
The revelations about his turbulent past cast a new light on the tortured soul of Depardieu, who became estranged from his own son Guillaume, a talented actor who died in 2008. Guillaume died at the age of 37 from pneumonia, but had earlier had a leg amputated after a scooter accident and had been a drug addict and rent boy. He also spent two spells in prison, on drugs and theft charges.
"Guillaume experienced the same thing that I did," says Depardieu, referring to the mockery of his own father who "was reeling drunk from time to time with bad wine". The book suggests that the film star remains riddled with guilt over the death of Guillaume, who had accused his father of being an alcoholic obsessed with money.
Depardieu, now a 65-year old hulking Rabelaisian figure, told French television last week that he was "not an alcoholic", because "alcoholics never get drunk". Asked about his attitude to money, after he left France in 2012 to seek tax exile in Belgium then Russia, he said: "I've always been rich. It's not about money."
He writes about his son in the book: "I took a long time to understand Guillaume with his demands and his suffering, and I didn't know how to respond. I could never find the words."
But he also says that the rest of his family - he had two children with his first wife Elisabeth and two others from subsequent relationships - are ashamed to bear his name. "I told them, 'What do you want?' Change your name for God's sake, if it bothers you," he says.
Anecdotes about Depardieu's marathon drinking bouts abound - he recently confessed to drinking 14 bottles of wine a day. Last year, he was banned for driving for six months after falling off his scooter in Paris while drunk.
After escaping from Chateauroux with "the music of Racine in my ears", Depardieu, the self-described "rough-hewn peasant" with "a boxer's nose" went to Paris where he went into theatre. His talent was nurtured by Marguerite Duras, and his film career took off in 1974 when he played a petty thief in Les Valseuses.
Stardom soon beckoned, and he won a Cesar award for best actor in Cyrano de Bergerac. He was also successful in Hollywood, winning a best actor Golden Globe for his role in Green Card with Andie MacDowell.
But after becoming one of the most prolific actors ever, he began to squander his talent, appearing in films that either received poor reviews or were ignored by the critics. He invested in a vineyard in Anjou, which he continues to visit from his Russian exile. He says he was forced to leave France to escape the Socialist government's "87 per cent" tax on his wealth, and has accepted Russian citizenship.
He claims to have hit it off with Russian President Vladimir Putin because "we could both have ended up as hoodlums." Mr Putin was apparently attracted to "the fact that I had occasionally been picked up off the pavement dead drunk."
- Independent