Lammot du Pont Copeland (May 19, 1905 at Christiana Hundred, Delaware - July 1, 1983 at Mt. Cuba Center, Greenville, Delaware) son of Charles Copeland (March 30, 1867 in Englewood, New Jersey - February 3, 1944) and Louisa d'Andelot du Pont (January 25, 1868 in New Castle County, Delaware - August 10, 1926). They were married February 16, 1904 at St. Amour in Wilmington, Delaware. He was the great-great-grandson of DuPont-founder Eleuthère Irénée du Pont, and the company’s 11th president from 1962 to 1967. He married Pamela Cunningham (May 5, 1906 - January 25, 2001) on February 1, 1930 at Litchfield, Connecticut. She was the daughter of Mr. & Mrs. Seymour Cunningham of Litchfield. Lammot and Pamela had three children: Bouchaine Vineyards winery owner Gerret van Sweringen Copeland, Lammot du Pont Copeland, Jr., and daughter Louisa du Pont Copeland, who married James Biddle.
In 1962 Lammot established the Andelot Fellowships at the University of Delaware. He had his portrait painted by artist Salvador Dalí.
Together with Hugh Moore and William Henry Draper Jr. he founded in 1965 the Population Crisis Committee (now "Population Action International") as a lobbying organization for government involvement in population control.