Louis-Dreyfus was born in Paris in 1932. His great-grandfather Léopold Louis-Dreyfus founded the Louis Dreyfus Group in 1851. His mother, Dolores Porges, was American-born, the daughter of a Brazilian father and a Mexican mother. His father, Pierre Louis-Dreyfus,, was a Frenchman who headed the Louis Dreyfus group. His father, who was Jewish, fought in the French Resistance during World War II; his mother was Catholic. He has one sister, Dominique Cornwell. In 1940, Louis-Dreyfus moved to the United States with his mother after her divorce from Pierre. By 1945, he had adopted the name William as a symbol of his integration into American society. After graduating from Duke University and Duke University School of Law, Louis-Dreyfus worked at the law firm of Dewey Ballantine, New York, before joining Louis Dreyfus in 1965. Louis-Dreyfus was chairman of the Poetry Society of America from 1998 to 2008. He had poems published in publications such as The Hudson Review. Louis-Dreyfus died at his home in Mount Kisco, New York on September 16, 2016 at the age of 84. His daughter Julia dedicated her 2016 Emmy win to her late father.
Politics
In October 2012, Dreyfus published a full page ad in The New York Times titled "A Call To Arms To The Wealthy To Protect The Right To Vote" encouraging wealthy people in the United States to fight voter suppression. Dreyfus himself donated $1 million.
Personal life
Louis-Dreyfus was married twice. In 1955, he married Judith LeFever; they had one daughter, actress Julia Louis-Dreyfus before divorcing in 1962. In 1965, he married Phyllis Blankenship; they had two daughters, both social workers: Phoebe Émilie Dominique Louis-Dreyfus Eavis and Emma R. Louis-Dreyfus. In 1996, Phoebe married Englishfinancial journalist Peter Eavis at St. Matthew's Episcopal Church inBedford, New York. He also had a son, Raphael Penteado. One cousin is Jean Louis-Dreyfus, grandson of the family business founder, Léopold Louis-Dreyfus. Another cousin is Robert Louis-Dreyfus, the former chief executive officer of Adidas and ex-Chairman of French football club Olympique de Marseille.